# What is CVE-2023-20591? > CVE-2023-20591 is a critical-severity flaw (CVSS 10.0) in Epyc 8024pn Firmware from Amd, published on 13 August 2024. It is not on the list of flaws known to be exploited today. The latest forecast puts its chance of use in the next 30 days at 0.3%. If you run an affected version, plan in the vendor’s fix. Canonical page: https://www.precursorintelligence.com/what-is/cve-2023-20591 ## At a glance - **Verdict:** Fix this soon. Not confirmed as exploited yet, but serious or likely enough that it should not wait for a quiet month. - **Precursor Intelligence risk score:** 55 out of 100 (Medium); action: Plan remediation. Kept up to date as the evidence changes. - **Severity:** Critical (CVSS 10.0 out of 10) - **Known to be exploited:** No, not on the list of flaws known to be exploited today - **Chance of use in the next 30 days:** 0.3% (latest exploit-likelihood forecast) - **Published:** 13 August 2024 - **Record last updated:** 13 March 2025 - **Main product:** Epyc 8024pn Firmware from Amd - **Affected products:** 130 ## What is CVE-2023-20591? In plain terms It can be attacked from anywhere on the internet without logging in, and nobody has to click anything. If it works, the attacker can read data, change data and take it offline. ### The official description Improper re-initialization of IOMMU during the DRTM event may permit an untrusted platform configuration to persist, allowing an attacker to read or modify hypervisor memory, potentially resulting in loss of confidentiality, integrity, and availability. ### What kind of flaw is it? - CWE-665: Improper Initialization ### How an attack on it works - Where an attacker can be: Anywhere on the internet - How hard it is to pull off: Easy: no special conditions - Login needed first: No login needed - Does someone have to click: No, nobody has to do anything - What an attacker gets: Can read data, change data and take it offline Severity vector: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H` ## Is CVE-2023-20591 being exploited? Not that we know of It is not on the list of flaws known to be exploited today. The latest forecast puts the chance of it being used in the next 30 days at 0.3%. That can change at any time, which is why we keep watching. Exploit likelihood over the last 7 days: 0.3%, 0.3%, 0.3%, 0.3%, 0.3%, 0.3%, 0.3%. ### Timeline - 13 August 2024: Published - 13 March 2025: Record last updated ### How Precursor Intelligence ranks it CVE-2023-20591 scores **55 out of 100 (Medium)**, with the action "Plan remediation". Every published flaw gets a risk score from 0 to 100, kept up to date as the evidence changes. Four things go into the score, from the one that counts most to the ones that count less: - Evidence it is being exploited: biggest factor - How severe it is: strong factor - How widely exposed it is: smaller factor - Threat activity around it: smaller factor 85 and above is Critical. Anything confirmed as exploited is always marked for an emergency patch, whatever its score. When this flaw matches software you track, it lands in your list with its score and the reasons behind it. ## Who is affected by CVE-2023-20591? The published record lists 130 products. Versions are as published: "before genoapi_1.0.0.8" means every version up to, but not including, genoapi_1.0.0.8. - [Epyc 8024pn Firmware](https://www.precursorintelligence.com/product/amd/epyc_8024pn_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before genoapi_1.0.0.8 - [Epyc 7203](https://www.precursorintelligence.com/product/amd/epyc_7203) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 7203 Firmware](https://www.precursorintelligence.com/product/amd/epyc_7203_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before milanpi_1.0.0.b - [Epyc 7203p](https://www.precursorintelligence.com/product/amd/epyc_7203p) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 7203p Firmware](https://www.precursorintelligence.com/product/amd/epyc_7203p_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before milanpi_1.0.0.b - [Epyc 72f3](https://www.precursorintelligence.com/product/amd/epyc_72f3) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 72f3 Firmware](https://www.precursorintelligence.com/product/amd/epyc_72f3_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before milanpi_1.0.0.b - [Epyc 7303](https://www.precursorintelligence.com/product/amd/epyc_7303) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 7303 Firmware](https://www.precursorintelligence.com/product/amd/epyc_7303_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before milanpi_1.0.0.b - [Epyc 7303p](https://www.precursorintelligence.com/product/amd/epyc_7303p) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 7303p Firmware](https://www.precursorintelligence.com/product/amd/epyc_7303p_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before milanpi_1.0.0.b - [Epyc 7313](https://www.precursorintelligence.com/product/amd/epyc_7313) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 7313 Firmware](https://www.precursorintelligence.com/product/amd/epyc_7313_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before milanpi_1.0.0.b - [Epyc 7313p](https://www.precursorintelligence.com/product/amd/epyc_7313p) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 7313p Firmware](https://www.precursorintelligence.com/product/amd/epyc_7313p_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before milanpi_1.0.0.b - [Epyc 7343](https://www.precursorintelligence.com/product/amd/epyc_7343) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 7343 Firmware](https://www.precursorintelligence.com/product/amd/epyc_7343_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before milanpi_1.0.0.b - [Epyc 7373x](https://www.precursorintelligence.com/product/amd/epyc_7373x) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 7373x Firmware](https://www.precursorintelligence.com/product/amd/epyc_7373x_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before milanpi_1.0.0.b - [Epyc 73f3](https://www.precursorintelligence.com/product/amd/epyc_73f3) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 73f3 Firmware](https://www.precursorintelligence.com/product/amd/epyc_73f3_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before milanpi_1.0.0.b - [Epyc 7413](https://www.precursorintelligence.com/product/amd/epyc_7413) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 7413 Firmware](https://www.precursorintelligence.com/product/amd/epyc_7413_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before milanpi_1.0.0.b - [Epyc 7443](https://www.precursorintelligence.com/product/amd/epyc_7443) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 7443 Firmware](https://www.precursorintelligence.com/product/amd/epyc_7443_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before milanpi_1.0.0.b - [Epyc 7443p](https://www.precursorintelligence.com/product/amd/epyc_7443p) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 7443p Firmware](https://www.precursorintelligence.com/product/amd/epyc_7443p_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before milanpi_1.0.0.b - [Epyc 7453](https://www.precursorintelligence.com/product/amd/epyc_7453) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 7453 Firmware](https://www.precursorintelligence.com/product/amd/epyc_7453_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before milanpi_1.0.0.b - [Epyc 7473x](https://www.precursorintelligence.com/product/amd/epyc_7473x) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 7473x Firmware](https://www.precursorintelligence.com/product/amd/epyc_7473x_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before milanpi_1.0.0.b - [Epyc 74f3](https://www.precursorintelligence.com/product/amd/epyc_74f3) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 74f3 Firmware](https://www.precursorintelligence.com/product/amd/epyc_74f3_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before milanpi_1.0.0.b - [Epyc 7513](https://www.precursorintelligence.com/product/amd/epyc_7513) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 7513 Firmware](https://www.precursorintelligence.com/product/amd/epyc_7513_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before milanpi_1.0.0.b - [Epyc 7543](https://www.precursorintelligence.com/product/amd/epyc_7543) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 7543 Firmware](https://www.precursorintelligence.com/product/amd/epyc_7543_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before milanpi_1.0.0.b - [Epyc 7543p](https://www.precursorintelligence.com/product/amd/epyc_7543p) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 7543p Firmware](https://www.precursorintelligence.com/product/amd/epyc_7543p_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before milanpi_1.0.0.b - [Epyc 7573x](https://www.precursorintelligence.com/product/amd/epyc_7573x) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 7573x Firmware](https://www.precursorintelligence.com/product/amd/epyc_7573x_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before milanpi_1.0.0.b - [Epyc 75f3](https://www.precursorintelligence.com/product/amd/epyc_75f3) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 75f3 Firmware](https://www.precursorintelligence.com/product/amd/epyc_75f3_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before milanpi_1.0.0.b - [Epyc 7643](https://www.precursorintelligence.com/product/amd/epyc_7643) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 7643 Firmware](https://www.precursorintelligence.com/product/amd/epyc_7643_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before milanpi_1.0.0.b - [Epyc 7643p](https://www.precursorintelligence.com/product/amd/epyc_7643p) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 7643p Firmware](https://www.precursorintelligence.com/product/amd/epyc_7643p_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before milanpi_1.0.0.b - [Epyc 7663](https://www.precursorintelligence.com/product/amd/epyc_7663) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 7663 Firmware](https://www.precursorintelligence.com/product/amd/epyc_7663_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before milanpi_1.0.0.b - [Epyc 7663p](https://www.precursorintelligence.com/product/amd/epyc_7663p) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 7663p Firmware](https://www.precursorintelligence.com/product/amd/epyc_7663p_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before milanpi_1.0.0.b - [Epyc 7713](https://www.precursorintelligence.com/product/amd/epyc_7713) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 7713 Firmware](https://www.precursorintelligence.com/product/amd/epyc_7713_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before milanpi_1.0.0.b - [Epyc 7713p](https://www.precursorintelligence.com/product/amd/epyc_7713p) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 7713p Firmware](https://www.precursorintelligence.com/product/amd/epyc_7713p_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before milanpi_1.0.0.b - [Epyc 7763](https://www.precursorintelligence.com/product/amd/epyc_7763) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 7763 Firmware](https://www.precursorintelligence.com/product/amd/epyc_7763_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before milanpi_1.0.0.b - [Epyc 7773x](https://www.precursorintelligence.com/product/amd/epyc_7773x) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 7773x Firmware](https://www.precursorintelligence.com/product/amd/epyc_7773x_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before milanpi_1.0.0.b - [Epyc 8024p](https://www.precursorintelligence.com/product/amd/epyc_8024p) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 8024p Firmware](https://www.precursorintelligence.com/product/amd/epyc_8024p_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before genoapi_1.0.0.8 - [Epyc 8024pn](https://www.precursorintelligence.com/product/amd/epyc_8024pn) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 8124p](https://www.precursorintelligence.com/product/amd/epyc_8124p) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 8124p Firmware](https://www.precursorintelligence.com/product/amd/epyc_8124p_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before genoapi_1.0.0.8 - [Epyc 8124pn](https://www.precursorintelligence.com/product/amd/epyc_8124pn) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 8124pn Firmware](https://www.precursorintelligence.com/product/amd/epyc_8124pn_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before genoapi_1.0.0.8 - [Epyc 8224p](https://www.precursorintelligence.com/product/amd/epyc_8224p) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 8224p Firmware](https://www.precursorintelligence.com/product/amd/epyc_8224p_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before genoapi_1.0.0.8 - [Epyc 8224pn](https://www.precursorintelligence.com/product/amd/epyc_8224pn) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 8224pn Firmware](https://www.precursorintelligence.com/product/amd/epyc_8224pn_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before genoapi_1.0.0.8 - [Epyc 8324p](https://www.precursorintelligence.com/product/amd/epyc_8324p) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 8324p Firmware](https://www.precursorintelligence.com/product/amd/epyc_8324p_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before genoapi_1.0.0.8 - [Epyc 8324pn](https://www.precursorintelligence.com/product/amd/epyc_8324pn) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 8324pn Firmware](https://www.precursorintelligence.com/product/amd/epyc_8324pn_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before genoapi_1.0.0.8 - [Epyc 8434p](https://www.precursorintelligence.com/product/amd/epyc_8434p) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 8434p Firmware](https://www.precursorintelligence.com/product/amd/epyc_8434p_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before genoapi_1.0.0.8 - [Epyc 8434pn](https://www.precursorintelligence.com/product/amd/epyc_8434pn) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 8434pn Firmware](https://www.precursorintelligence.com/product/amd/epyc_8434pn_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before genoapi_1.0.0.8 - [Epyc 8534p](https://www.precursorintelligence.com/product/amd/epyc_8534p) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 8534p Firmware](https://www.precursorintelligence.com/product/amd/epyc_8534p_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before genoapi_1.0.0.8 - [Epyc 8534pn](https://www.precursorintelligence.com/product/amd/epyc_8534pn) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 8534pn Firmware](https://www.precursorintelligence.com/product/amd/epyc_8534pn_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before genoapi_1.0.0.8 - [Epyc 9124](https://www.precursorintelligence.com/product/amd/epyc_9124) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 9124 Firmware](https://www.precursorintelligence.com/product/amd/epyc_9124_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before genoapi_1.0.0.8 - [Epyc 9174f](https://www.precursorintelligence.com/product/amd/epyc_9174f) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 9174f Firmware](https://www.precursorintelligence.com/product/amd/epyc_9174f_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before genoapi_1.0.0.8 - [Epyc 9184x](https://www.precursorintelligence.com/product/amd/epyc_9184x) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 9184x Firmware](https://www.precursorintelligence.com/product/amd/epyc_9184x_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before genoapi_1.0.0.8 - [Epyc 9224](https://www.precursorintelligence.com/product/amd/epyc_9224) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 9224 Firmware](https://www.precursorintelligence.com/product/amd/epyc_9224_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before genoapi_1.0.0.8 - [Epyc 9254](https://www.precursorintelligence.com/product/amd/epyc_9254) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 9254 Firmware](https://www.precursorintelligence.com/product/amd/epyc_9254_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before genoapi_1.0.0.8 - [Epyc 9274f](https://www.precursorintelligence.com/product/amd/epyc_9274f) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 9274f Firmware](https://www.precursorintelligence.com/product/amd/epyc_9274f_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before genoapi_1.0.0.8 - [Epyc 9334](https://www.precursorintelligence.com/product/amd/epyc_9334) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 9334 Firmware](https://www.precursorintelligence.com/product/amd/epyc_9334_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before genoapi_1.0.0.8 - [Epyc 9354](https://www.precursorintelligence.com/product/amd/epyc_9354) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 9354 Firmware](https://www.precursorintelligence.com/product/amd/epyc_9354_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before genoapi_1.0.0.8 - [Epyc 9354p](https://www.precursorintelligence.com/product/amd/epyc_9354p) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 9354p Firmware](https://www.precursorintelligence.com/product/amd/epyc_9354p_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before genoapi_1.0.0.8 - [Epyc 9374f](https://www.precursorintelligence.com/product/amd/epyc_9374f) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 9374f Firmware](https://www.precursorintelligence.com/product/amd/epyc_9374f_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before genoapi_1.0.0.8 - [Epyc 9384x](https://www.precursorintelligence.com/product/amd/epyc_9384x) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 9384x Firmware](https://www.precursorintelligence.com/product/amd/epyc_9384x_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before genoapi_1.0.0.8 - [Epyc 9454](https://www.precursorintelligence.com/product/amd/epyc_9454) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 9454 Firmware](https://www.precursorintelligence.com/product/amd/epyc_9454_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before genoapi_1.0.0.8 - [Epyc 9454p](https://www.precursorintelligence.com/product/amd/epyc_9454p) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 9454p Firmware](https://www.precursorintelligence.com/product/amd/epyc_9454p_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before genoapi_1.0.0.8 - [Epyc 9474f](https://www.precursorintelligence.com/product/amd/epyc_9474f) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 9474f Firmware](https://www.precursorintelligence.com/product/amd/epyc_9474f_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before genoapi_1.0.0.8 - [Epyc 9534](https://www.precursorintelligence.com/product/amd/epyc_9534) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 9534 Firmware](https://www.precursorintelligence.com/product/amd/epyc_9534_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before genoapi_1.0.0.8 - [Epyc 9554](https://www.precursorintelligence.com/product/amd/epyc_9554) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 9554 Firmware](https://www.precursorintelligence.com/product/amd/epyc_9554_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before genoapi_1.0.0.8 - [Epyc 9554p](https://www.precursorintelligence.com/product/amd/epyc_9554p) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 9554p Firmware](https://www.precursorintelligence.com/product/amd/epyc_9554p_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before genoapi_1.0.0.8 - [Epyc 9634](https://www.precursorintelligence.com/product/amd/epyc_9634) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 9634 Firmware](https://www.precursorintelligence.com/product/amd/epyc_9634_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before genoapi_1.0.0.8 - [Epyc 9654](https://www.precursorintelligence.com/product/amd/epyc_9654) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 9654 Firmware](https://www.precursorintelligence.com/product/amd/epyc_9654_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before genoapi_1.0.0.8 - [Epyc 9654p](https://www.precursorintelligence.com/product/amd/epyc_9654p) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 9654p Firmware](https://www.precursorintelligence.com/product/amd/epyc_9654p_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before genoapi_1.0.0.8 - [Epyc 9684x](https://www.precursorintelligence.com/product/amd/epyc_9684x) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 9684x Firmware](https://www.precursorintelligence.com/product/amd/epyc_9684x_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before genoapi_1.0.0.8 - [Epyc 9734](https://www.precursorintelligence.com/product/amd/epyc_9734) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 9734 Firmware](https://www.precursorintelligence.com/product/amd/epyc_9734_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before genoapi_1.0.0.8 - [Epyc 9754](https://www.precursorintelligence.com/product/amd/epyc_9754) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 9754 Firmware](https://www.precursorintelligence.com/product/amd/epyc_9754_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before genoapi_1.0.0.8 - [Epyc 9754s](https://www.precursorintelligence.com/product/amd/epyc_9754s) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Hardware): version not specified - [Epyc 9754s Firmware](https://www.precursorintelligence.com/product/amd/epyc_9754s_firmware) by [Amd](https://www.precursorintelligence.com/vendors/amd) (Operating system): before genoapi_1.0.0.8 ## How do I fix CVE-2023-20591? 1. **Check whether you run it.** Compare your versions with the affected products above. Not sure what you run? Precursor Intelligence can work it out from your public website, or you can pick it from a list. 2. **Apply the vendor’s fix.** Install the update named in the vendor’s advisory. We’ve put the advisory first in the list. 3. **If you can’t patch today.** Follow any mitigation the vendor publishes, and limit who can reach the affected system from the internet until the update is in. 4. **Keep an eye on it.** Track the product and we tell you as soon as we spot this flaw on the list of exploited flaws, or a jump in its exploit likelihood. ### References - [amd.com](https://www.amd.com/en/resources/product-security/bulletin/amd-sb-3003.html) (Vendor advisory) ## Questions ### What is CVE-2023-20591? CVE-2023-20591 is a critical-severity flaw in Epyc 8024pn Firmware from Amd, published on 13 August 2024. It can be attacked from anywhere on the internet without logging in, and nobody has to click anything. If it works, the attacker can read data, change data and take it offline. ### How serious is CVE-2023-20591? It scores 10.0 out of 10 on the CVSS severity scale, which is critical. Our risk score for CVE-2023-20591 is 55 out of 100, which is Medium. Its action is "Plan remediation". Not confirmed as exploited yet, but serious or likely enough that it should not wait for a quiet month. ### Is CVE-2023-20591 being exploited? It is not on the list of flaws known to be exploited today. The latest forecast puts the chance of it being used in the next 30 days at 0.3%. That can change at any time, which is why we keep watching. ### Which versions does CVE-2023-20591 affect? For Epyc 8024pn Firmware from Amd: before genoapi_1.0.0.8. The record lists 130 products in all, each with its versions, under "Who is affected" on this page. ### How do I fix CVE-2023-20591? Install the update the vendor names in its advisory, linked first under "How do I fix" on this page. If you can't patch today, follow the vendor's mitigation and limit who can reach the affected system from the internet. ## Does CVE-2023-20591 affect you? Precursor Intelligence keeps checking for you: - **Tell us what you run.** Pick your software from a list, or let us work it out from your website. - **We match it to every flaw.** Over 400,000 published flaws, checked against your list. - **Ranked by real-world risk.** Every flaw gets a 0 to 100 risk score, kept up to date, led by evidence criminals are using it. - **Told as soon as we know.** An alert by email, in the app or by webhook to your own tools. Start free (no card, nothing to install): https://www.precursorintelligence.com/register Book a demo: https://www.precursorintelligence.com/contact