CVE-2022-4269

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-12-05 · updated 2026-10-14
Weakness: CWE-833

Description

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.

Affected products

Linux kernel: 4.1-rc1

References

https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html
https://lore.kernel.org/netdev/33dc43f587ec1388ba456b4915c75f02a8aae226.1663945716.git.dcaratti%40redhat.com/
https://security.netapp.com/advisory/ntap-20230929-0001/
https://www.debian.org/security/2023/dsa-5480
https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html
https://lore.kernel.org/netdev/33dc43f587ec1388ba456b4915c75f02a8aae226.1663945716.git.dcaratti%40redhat.com/
https://security.netapp.com/advisory/ntap-20230929-0001/
https://www.debian.org/security/2023/dsa-5480
https://cert-portal.siemens.com/productcert/html/ssa-794697.html

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