CVE-2023-0590

Severity: medium (CVSS 4.7 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: 2023-03-23 · updated 2026-10-14
Weakness: CWE-416

Description

A use-after-free flaw was found in qdisc_graft in net/sched/sch_api.c in the Linux Kernel due to a race problem. This flaw leads to a denial of service issue. If patch ebda44da44f6 ("net: sched: fix race condition in qdisc_graft()") not applied yet, then kernel could be affected.

Affected products

Linux kernel: before 6.1; 6.1-rc1 — fixed in 6.1

How to fix

Upgrade to a fixed version: Linux kernel 6.1. Check the vendor advisory for mitigations.

References

https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html
https://lore.kernel.org/all/20221018203258.2793282-1-edumazet%40google.com/
https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html
https://lore.kernel.org/all/20221018203258.2793282-1-edumazet%40google.com/
https://cert-portal.siemens.com/productcert/html/ssa-769027.html
https://cert-portal.siemens.com/productcert/html/ssa-794697.html
https://cert-portal.siemens.com/productcert/html/ssa-806742.html

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