What’s Vulnerable › Vulnerabilities

CVE-2024-53164: net: sched: fix ordering of qlen adjustment

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-12-27 · updated 2026-10-15

Description

In the Linux kernel, the following vulnerability has been resolved: net: sched: fix ordering of qlen adjustment Changes to sch->q.qlen around qdisc_tree_reduce_backlog() need to happen _before_ a call to said function because otherwise it may fail to notify parent qdiscs when the child is about to become empty.

Affected products

• Linux kernel: before 5.4.289; from 5.5 before 5.10.233; from 5.11 before 5.15.176; from 5.16 before 6.1.122; from 6.2 before 6.6.68; from 6.7 before 6.12.7 — fixed in 5.10.233, 5.15.176, 5.4.289, 6.1.122, 6.12.7, 6.6.68

How to fix

Upgrade to a fixed version: Linux kernel 5.10.233, 5.15.176, 5.4.289, 6.1.122. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/33db36b3c53d0fda2699ea39ba72bee4de8336e8
• https://git.kernel.org/stable/c/44782565e1e6174c94bddfa72ac7267cd09c1648
• https://git.kernel.org/stable/c/489422e2befff88a1de52b2acebe7b333bded025
• https://git.kernel.org/stable/c/5e473f462a16f1a34e49ea4289a667d2e4f35b52
• https://git.kernel.org/stable/c/5eb7de8cd58e73851cd37ff8d0666517d9926948
• https://git.kernel.org/stable/c/97e13434b5da8e91bdf965352fad2141d13d72d3
• https://git.kernel.org/stable/c/e3e54ad9eff8bdaa70f897e5342e34b76109497f
• https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
• https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html
• https://cert-portal.siemens.com/productcert/html/ssa-398330.html

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