CVE-2022-3586

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-10-19 · updated 2026-10-14
Weakness: CWE-416

Description

A flaw was found in the Linux kernel’s networking code. A use-after-free was found in the way the sch_sfb enqueue function used the socket buffer (SKB) cb field after the same SKB had been enqueued (and freed) into a child qdisc. This flaw allows a local, unprivileged user to crash the system, causing a denial of service.

Affected products

Debian Linux: 10.0
Linux kernel: from 2.6.39 through 5.19; 6.0-rc1, 6.0-rc2, 6.0-rc3, 6.0-rc4

References

https://github.com/torvalds/linux/commit/9efd23297cca
https://lists.debian.org/debian-lts-announce/2022/11/msg00001.html
https://www.zerodayinitiative.com/advisories/upcoming/
https://github.com/torvalds/linux/commit/9efd23297cca
https://lists.debian.org/debian-lts-announce/2022/11/msg00001.html
https://www.zerodayinitiative.com/advisories/upcoming/
https://cert-portal.siemens.com/productcert/html/ssa-794697.html
https://cert-portal.siemens.com/productcert/html/ssa-831302.html

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