# What is CVE-2022-0847? > CVE-2022-0847 is a high-severity flaw (CVSS 7.8) in Linux kernel, published on 10 March 2022. It is on the list of flaws known to be exploited, so criminals are already using it. The latest forecast puts its chance of use in the next 30 days at 93%. If you run an affected version, patch it first. Canonical page: https://www.precursorintelligence.com/what-is/cve-2022-0847 ## At a glance - **Verdict:** Fix this now. Attackers are using this flaw today. If you run an affected version, it goes to the top of your list. - **Precursor Intelligence risk score:** 75 out of 100 (High); action: Emergency patch. Kept up to date as the evidence changes. - **Severity:** High (CVSS 7.8 out of 10) - **Known to be exploited:** Yes, it is on the government list of flaws known to be exploited - **Chance of use in the next 30 days:** 93% (latest exploit-likelihood forecast) - **Published:** 10 March 2022 - **Record last updated:** 8 April 2025 - **Main product:** Linux kernel - **Affected products:** 39 ## What is CVE-2022-0847? In plain terms An attacker has to be already on the device with an ordinary user account, and nobody has to click anything. If it works, the attacker can read data, change data and take it offline. ### The official description A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe and push_pipe functions in the Linux kernel and could thus contain stale values. An unprivileged local user could use this flaw to write to pages in the page cache backed by read only files and as such escalate their privileges on the system. ### What kind of flaw is it? - CWE-665: Improper Initialization ### How an attack on it works - Where an attacker can be: Already on the device - How hard it is to pull off: Easy: no special conditions - Login needed first: An ordinary user account - 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:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H` ## Is CVE-2022-0847 being exploited? Yes Attackers are already using it. It is on the government list of flaws known to be exploited, and the latest forecast puts the chance of it being used in the next 30 days at 93%. Exploit likelihood over the last 7 days: 93%, 93%, 93%, 93%, 93%, 93%, 93%. ### Timeline - 10 March 2022: Published - 8 April 2025: Record last updated - 22 November 2025: Exploit likelihood fell ### How Precursor Intelligence ranks it CVE-2022-0847 scores **75 out of 100 (High)**, with the action "Emergency patch". 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-2022-0847? The published record lists 39 products. Versions are as published: "5.8 to before 5.10.102" means from 5.8 up to, but not including, 5.10.102. - [Linux kernel](https://www.precursorintelligence.com/product/linux/linux_kernel) by [Linux](https://www.precursorintelligence.com/vendors/linux) (Operating system): 5.8 to before 5.10.102, 5.15 to before 5.15.25, 5.16 to before 5.16.11 - [Enterprise Linux Server for Power Little Endian Update Services for Sap Solutions](https://www.precursorintelligence.com/product/redhat/enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions) by [Red Hat](https://www.precursorintelligence.com/vendors/redhat) (Operating system): 8.1, 8.2, 8.4 - [Enterprise Linux Server Update Services for Sap Solutions](https://www.precursorintelligence.com/product/redhat/enterprise_linux_server_update_services_for_sap_solutions) by [Red Hat](https://www.precursorintelligence.com/vendors/redhat) (Operating system): 8.1, 8.2, 8.4 - [Enterprise Linux Eus](https://www.precursorintelligence.com/product/redhat/enterprise_linux_eus) by [Red Hat](https://www.precursorintelligence.com/vendors/redhat) (Operating system): 8.2, 8.4 - [Enterprise Linux for Ibm Z Systems Eus](https://www.precursorintelligence.com/product/redhat/enterprise_linux_for_ibm_z_systems_eus) by [Red Hat](https://www.precursorintelligence.com/vendors/redhat) (Operating system): 8.2, 8.4 - [Enterprise Linux for Power Little Endian Eus](https://www.precursorintelligence.com/product/redhat/enterprise_linux_for_power_little_endian_eus) by [Red Hat](https://www.precursorintelligence.com/vendors/redhat) (Operating system): 8.2, 8.4 - [Enterprise Linux for Real Time for Nfv Tus](https://www.precursorintelligence.com/product/redhat/enterprise_linux_for_real_time_for_nfv_tus) by [Red Hat](https://www.precursorintelligence.com/vendors/redhat) (Operating system): 8.2, 8.4 - [Enterprise Linux for Real Time Tus](https://www.precursorintelligence.com/product/redhat/enterprise_linux_for_real_time_tus) by [Red Hat](https://www.precursorintelligence.com/vendors/redhat) (Operating system): 8.2, 8.4 - [Enterprise Linux Server Aus](https://www.precursorintelligence.com/product/redhat/enterprise_linux_server_aus) by [Red Hat](https://www.precursorintelligence.com/vendors/redhat) (Operating system): 8.2, 8.4 - [Enterprise Linux Server Tus](https://www.precursorintelligence.com/product/redhat/enterprise_linux_server_tus) by [Red Hat](https://www.precursorintelligence.com/vendors/redhat) (Operating system): 8.2, 8.4 - [Codeready Linux Builder](https://www.precursorintelligence.com/product/redhat/codeready_linux_builder) by [Red Hat](https://www.precursorintelligence.com/vendors/redhat) (Application): version not specified - [Enterprise Linux](https://www.precursorintelligence.com/product/redhat/enterprise_linux) by [Red Hat](https://www.precursorintelligence.com/vendors/redhat) (Operating system): 8.0 - [Enterprise Linux for Ibm Z Systems](https://www.precursorintelligence.com/product/redhat/enterprise_linux_for_ibm_z_systems) by [Red Hat](https://www.precursorintelligence.com/vendors/redhat) (Operating system): 8.0 - [Enterprise Linux for Power Little Endian](https://www.precursorintelligence.com/product/redhat/enterprise_linux_for_power_little_endian) by [Red Hat](https://www.precursorintelligence.com/vendors/redhat) (Operating system): 8.0 - [Enterprise Linux for Real Time](https://www.precursorintelligence.com/product/redhat/enterprise_linux_for_real_time) by [Red Hat](https://www.precursorintelligence.com/vendors/redhat) (Operating system): 8 - [Enterprise Linux for Real Time for Nfv](https://www.precursorintelligence.com/product/redhat/enterprise_linux_for_real_time_for_nfv) by [Red Hat](https://www.precursorintelligence.com/vendors/redhat) (Operating system): 8 - [Fedora](https://www.precursorintelligence.com/product/fedoraproject/fedora) by [Fedoraproject](https://www.precursorintelligence.com/vendors/fedoraproject) (Operating system): 35 - [H300e](https://www.precursorintelligence.com/product/netapp/h300e) by [Netapp](https://www.precursorintelligence.com/vendors/netapp) (Hardware): version not specified - [H300e Firmware](https://www.precursorintelligence.com/product/netapp/h300e_firmware) by [Netapp](https://www.precursorintelligence.com/vendors/netapp) (Operating system): version not specified - [H300s](https://www.precursorintelligence.com/product/netapp/h300s) by [Netapp](https://www.precursorintelligence.com/vendors/netapp) (Hardware): version not specified - [H300s Firmware](https://www.precursorintelligence.com/product/netapp/h300s_firmware) by [Netapp](https://www.precursorintelligence.com/vendors/netapp) (Operating system): version not specified - [H410c](https://www.precursorintelligence.com/product/netapp/h410c) by [Netapp](https://www.precursorintelligence.com/vendors/netapp) (Hardware): version not specified - [H410c Firmware](https://www.precursorintelligence.com/product/netapp/h410c_firmware) by [Netapp](https://www.precursorintelligence.com/vendors/netapp) (Operating system): version not specified - [H410s](https://www.precursorintelligence.com/product/netapp/h410s) by [Netapp](https://www.precursorintelligence.com/vendors/netapp) (Hardware): version not specified - [H410s Firmware](https://www.precursorintelligence.com/product/netapp/h410s_firmware) by [Netapp](https://www.precursorintelligence.com/vendors/netapp) (Operating system): version not specified - [H500e](https://www.precursorintelligence.com/product/netapp/h500e) by [Netapp](https://www.precursorintelligence.com/vendors/netapp) (Hardware): version not specified - [H500e Firmware](https://www.precursorintelligence.com/product/netapp/h500e_firmware) by [Netapp](https://www.precursorintelligence.com/vendors/netapp) (Operating system): version not specified - [H500s](https://www.precursorintelligence.com/product/netapp/h500s) by [Netapp](https://www.precursorintelligence.com/vendors/netapp) (Hardware): version not specified - [H500s Firmware](https://www.precursorintelligence.com/product/netapp/h500s_firmware) by [Netapp](https://www.precursorintelligence.com/vendors/netapp) (Operating system): version not specified - [H700e](https://www.precursorintelligence.com/product/netapp/h700e) by [Netapp](https://www.precursorintelligence.com/vendors/netapp) (Hardware): version not specified - [H700e Firmware](https://www.precursorintelligence.com/product/netapp/h700e_firmware) by [Netapp](https://www.precursorintelligence.com/vendors/netapp) (Operating system): version not specified - [H700s](https://www.precursorintelligence.com/product/netapp/h700s) by [Netapp](https://www.precursorintelligence.com/vendors/netapp) (Hardware): version not specified - [H700s Firmware](https://www.precursorintelligence.com/product/netapp/h700s_firmware) by [Netapp](https://www.precursorintelligence.com/vendors/netapp) (Operating system): version not specified - [Ovirt-Engine](https://www.precursorintelligence.com/product/ovirt/ovirt-engine) by [Ovirt](https://www.precursorintelligence.com/vendors/ovirt) (Application): 4.4.10.2 - [Scalance Lpe9403](https://www.precursorintelligence.com/product/siemens/scalance_lpe9403) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [Scalance Lpe9403 Firmware](https://www.precursorintelligence.com/product/siemens/scalance_lpe9403_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.0 - [Sma1000](https://www.precursorintelligence.com/product/sonicwall/sma1000) by [SonicWall](https://www.precursorintelligence.com/vendors/sonicwall) (Hardware): version not specified - [Sma1000 Firmware](https://www.precursorintelligence.com/product/sonicwall/sma1000_firmware) by [SonicWall](https://www.precursorintelligence.com/vendors/sonicwall) (Operating system): up to 12.4.2-02044 - [Virtualization Host](https://www.precursorintelligence.com/product/redhat/virtualization_host) by [Red Hat](https://www.precursorintelligence.com/vendors/redhat) (Application): 4.0 ## How do I fix CVE-2022-0847? 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. **Check it wasn’t used before you patched.** Because criminals are already using this flaw, look for signs of a break-in on affected systems using the vendor’s guidance. ### References - [bugzilla.redhat.com](https://bugzilla.redhat.com/show_bug.cgi?id=2060795) (Issue tracking, Patch, Third-party advisory) - [packetstormsecurity.com](http://packetstormsecurity.com/files/166229/Dirty-Pipe-Linux-Privilege-Escalation.html) (Exploit, Third-party advisory, Vulnerability database) - [packetstormsecurity.com](http://packetstormsecurity.com/files/166230/Dirty-Pipe-SUID-Binary-Hijack-Privilege-Escalation.html) (Exploit, Third-party advisory, Vulnerability database) - [packetstormsecurity.com](http://packetstormsecurity.com/files/166258/Dirty-Pipe-Local-Privilege-Escalation.html) (Exploit, Third-party advisory, Vulnerability database) - [packetstormsecurity.com](http://packetstormsecurity.com/files/176534/Linux-4.20-KTLS-Read-Only-Write.html) (Third-party advisory, Vulnerability database) - [cert-portal.siemens.com](https://cert-portal.siemens.com/productcert/pdf/ssa-222547.pdf) (Third-party advisory) - [dirtypipe.cm4all.com](https://dirtypipe.cm4all.com/) (Exploit, Third-party advisory) - [psirt.global.sonicwall.com](https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2022-0015) (Third-party advisory) - [security.netapp.com](https://security.netapp.com/advisory/ntap-20220325-0005/) (Third-party advisory) - [suse.com](https://www.suse.com/support/kb/doc/?id=000020603) (Third-party advisory) ## Questions ### What is CVE-2022-0847? CVE-2022-0847 is a high-severity flaw in Linux kernel, published on 10 March 2022. An attacker has to be already on the device with an ordinary user account, and nobody has to click anything. If it works, the attacker can read data, change data and take it offline. ### How serious is CVE-2022-0847? It scores 7.8 out of 10 on the CVSS severity scale, which is high. Our risk score for CVE-2022-0847 is 75 out of 100, which is High. Its action is "Emergency patch". Attackers are using this flaw today. If you run an affected version, it goes to the top of your list. ### Is CVE-2022-0847 being exploited? Attackers are already using it. It is on the government list of flaws known to be exploited, and the latest forecast puts the chance of it being used in the next 30 days at 93%. ### Which versions does CVE-2022-0847 affect? For Linux kernel: 5.8 to before 5.10.102, 5.15 to before 5.15.25, 5.16 to before 5.16.11. The record lists 39 products in all, each with its versions, under "Who is affected" on this page. ### How do I fix CVE-2022-0847? 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. Because criminals are already using it, also check affected systems for signs of a break-in. ## Does CVE-2022-0847 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. 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