# CVE-2022-0847: Linux Kernel Privilege Escalation Vulnerability

> CVE-2022-0847: Linux Kernel Privilege Escalation Vulnerability. CVSS 7.8 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2022-0847
Last updated: 2025-10-21T23:15:44Z

- Published: 2022-03-07 00:00 UTC · Updated: 2025-10-21 23:15 UTC · Assigner: redhat
- CVSS: 7.8 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS: 92.8%, 100th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2022-04-25, federal due date 2022-05-16, ransomware use: Unknown
- CWE: CWE-665

## 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.

## CISA required action

Apply updates per vendor instructions.

## Affected vendors and products

- n/a: kernel

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2022-0847)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2022-0847)
- [http://packetstormsecurity.com/files/166229/Dirty-Pipe-Linux-Privilege-Escalation.html](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/166230/Dirty-Pipe-SUID-Binary-Hijack-Privilege-Escalation.html)
- [http://packetstormsecurity.com/files/166258/Dirty-Pipe-Local-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](http://packetstormsecurity.com/files/176534/Linux-4.20-KTLS-Read-Only-Write.html)
- [https://bugzilla.redhat.com/show\_bug.cgi?id=2060795](https://bugzilla.redhat.com/show_bug.cgi?id=2060795)
- [https://cert-portal.siemens.com/productcert/pdf/ssa-222547.pdf](https://cert-portal.siemens.com/productcert/pdf/ssa-222547.pdf)
- [https://dirtypipe.cm4all.com/](https://dirtypipe.cm4all.com/)
- [https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2022-0015](https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2022-0015)
- [https://security.netapp.com/advisory/ntap-20220325-0005/](https://security.netapp.com/advisory/ntap-20220325-0005/)
- [https://www.suse.com/support/kb/doc/?id=000020603](https://www.suse.com/support/kb/doc/?id=000020603)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2022-0847 · Markdown: https://rewindex.com/cve/CVE-2022-0847.md · JSON: https://rewindex.com/api/v1/cves/CVE-2022-0847 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:05:16.230Z