🛡️ AZL-58965 — kernel

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

CVE-2025-21703 affecting package kernel for versions less than 5.15.180.1-1

In the Linux kernel, the following vulnerability has been resolved:

netem: Update sch->q.qlen before qdisc_tree_reduce_backlog()

qdisc_tree_reduce_backlog() notifies parent qdisc only if child

qdisc becomes empty, therefore we need to reduce the backlog of the

child qdisc before calling it. Otherwise it would miss the opportunity

to call cops->qlen_notify(), in the case of DRR, it resulted in UAF

since DRR uses ->qlen_notify() to maintain its active list.

Affected software

AZL-58965 is recorded against 1 package.

  • kernel (fixed in 5.15.180.1-1)

Timeline and source

Published on 18 February 2025 and last revised on 21 April 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

nvd.nist.gov (Web)

Details

Severity Unknown
CVSS Score N/A
CVSS Vector N/A
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2025-02-18
Updated 2026-08-12
Modified 2026-04-21
Fix URL N/A

Affected Packages

Software From version Fixed in
kernel — 5.15.180.1-1

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