CVE-2022-0847
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…
Browse: All 2022 CVEs · All vendors
- CVSS score
- 7.8 High
- CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H- CISA KEV
- Yes — actively exploited (added 2022-04-25, remediation due 2022-05-16)
- Weakness (CWE)
- CWE-665
- Published
- 2022-03-10
- Last modified
- 2026-06-17
- NVD status
- Analyzed
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.
Affected products
- linux linux kernel
- fedoraproject fedora
- redhat enterprise linux
- redhat enterprise linux eus
- redhat enterprise linux for ibm z systems
- redhat enterprise linux for ibm z systems eus
- redhat enterprise linux for power little endian
- redhat enterprise linux for power little endian eus
- redhat enterprise linux for real time
- redhat enterprise linux for real time for nfv
- redhat enterprise linux for real time for nfv tus
- redhat enterprise linux for real time tus
Affected ranges per NVD CPE data; confirm exact versions in the vendor advisory.
Required action (CISA)
Apply updates per vendor instructions. Federal remediation deadline: 2022-05-16.
How to prioritize this
This vulnerability is on the CISA KEV list, meaning it is being actively exploited — treat it as urgent regardless of the raw CVSS number. Use the live CVE lookup for the latest NVD data, and the CVSS 3.1 calculator to model your own environmental score. For the actively exploited vulnerabilities that matter this week, read The Exploit HQ daily security brief.
References
- http://packetstormsecurity.com/files/166229/Dirty-Pipe-Linux-Privilege-Escalation.html
- http://packetstormsecurity.com/files/166230/Dirty-Pipe-SUID-Binary-Hijack-Privilege-Escalation.html
- http://packetstormsecurity.com/files/166258/Dirty-Pipe-Local-Privilege-Escalation.html
- http://packetstormsecurity.com/files/176534/Linux-4.20-KTLS-Read-Only-Write.html
- https://bugzilla.redhat.com/show_bug.cgi?id=2060795
- https://cert-portal.siemens.com/productcert/pdf/ssa-222547.pdf
- https://dirtypipe.cm4all.com/
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2022-0015
FAQ
Is CVE-2022-0847 actively exploited?
Yes. CISA added CVE-2022-0847 to its Known Exploited Vulnerabilities (KEV) catalog on 2022-04-25, with a federal remediation deadline of 2022-05-16. A KEV listing means real-world exploitation is confirmed, so patching this should be prioritized above many higher-CVSS bugs that aren't being exploited.
What is the CVSS score of CVE-2022-0847?
CVE-2022-0847 has a CVSS base score of 7.8 (High). Its vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Related vulnerabilities
- CVE-2025-39964 — Linux Kernel
- CVE-2026-53266 — Linux Kernel
- CVE-2025-39682 — Linux Kernel
- CVE-2026-53362 — Linux Kernel
- CVE-2022-0995 — Linux Kernel
- CVE-2022-0492 — Linux Kernel
Data source: NVD & CISA KEV. Shown as-is; nothing added. Last generated from NVD data — re-check the live tool for updates.
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