CVE-2022-0847

HIGH7.8

CISA KEV

Published 2022-03-10 · Updated 2026-06-17 · Source secalert@redhat.com

Summary

CVE-2022-0847 is a high-severity (CVSS 7.8) vulnerability in Linux Kernel. CISA added it to the Known Exploited Vulnerabilities catalog on April 25, 2022, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by May 16, 2022. CISA does not currently list it as used in ransomware campaigns. Linux has 32 vulnerabilities in the KEV catalog, 2 of them linked to ransomware.

All 32 known-exploited Linux vulnerabilities →

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.

CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE-665CWE-665

CISA Known-Exploited Vulnerability

Product: Linux — Kernel

Name: Linux Kernel Privilege Escalation Vulnerability

Date added: 2022-04-25 · Due: 2022-05-16

Required action: Apply updates per vendor instructions.

References

View on NVD

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