CISA KEV · Known exploitedHigh

CVE-2022-0847

Linux Kernel

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: 7.8
EPSS: 88.6%
CISA KEV: Listed
Published: 2022.03.11

PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV

Exploit probability88.6%

Technical severityCVSS 7.8

Vulnerability overview

Affected product and versions

Product: Linux Kernel
Affected versions: Linux Kernel 5.17 rc6, >= 5.8 < 5.10.102, >= 5.15 < 5.15.25, >= 5.16 < 5.16.11, 35, 8.0, 8.2, 8.4, 8, 8.1, 4.0, 4.4.10.2, < 2.0, <= 12.4.2-02044
Fixed versions: 5.10.102, 5.15.25, 5.16.11, 2.0

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

CISA required action

Apply updates per vendor instructions.

Due date: 2022.05.16

1
Identify
Confirm that Linux Kernel and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE: CWE-665
KEV added: 2022.04.25
Ransomware use: 미확인