What is CVE-2022-4269?

CVE-2022-4269 is a medium-severity vulnerability in Linux Kernel, classified under CWE-833. CVSS score: 5.5/10. Published 2022-12-05.

How severe is CVE-2022-4269?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Is CVE-2022-4269 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Linux Kernel

CVE-2022-4269

A flaw was found in the Linux kernel Traffic Control (TC) subsystem. Using a specific networking configuration (redirecting egress packets to ingress using TC action "mirred") a local unprivileged user could trigger a CPU soft lockup (ABBA deadlock) when the transport protocol in use (TCP or SCTP) does a retransmission, resulting in a denial of service condition.

Published 2022-12-05 · last modified 2026-10-14.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.002 (9.4th percentile), scored 2026-10-20.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 9th percentile — 9.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Linux Kernel — versions 4.1
Linux Kernel (Tc Subsystem) — versions Since upstream commit 53592b3 (v4.10-rc1)

Weakness classification (CWE)

CWE-833

Public proof-of-concept exploits

OSS-SASM/RhsaCveScanner

References

Frequently asked questions

What is CVE-2022-4269?: CVE-2022-4269 is a medium-severity vulnerability in Linux Kernel, classified under CWE-833. CVSS score: 5.5/10. Published 2022-12-05.
How severe is CVE-2022-4269?: Medium severity. CVSS v3 base score is 5.5 out of 10.
Is CVE-2022-4269 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.