CVE-2025-37798

In the Linux kernel, the following vulnerability has been resolved: codel: remove sch->q.qlen check before qdisc_tree_reduce_backlog() After making all ->qlen_notify() callbacks idempotent, now it is safe to remove the check of qlen!=0 from both fq_codel_dequeue() and codel_qdisc_dequeue().

CVSS 3.1

7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

0.2% chance of exploitation in the next 30 days; higher than 13% of CVEs (scores of 2026-10-25)

Published

2025-05-02

Modified

2026-10-15

Record from

the NVD, synced 2026-10-19

Affected

• debian:debian_linux
• linux:linux_kernel

References

• https://git.kernel.org/stable/c/2f9761a94bae33d26e6a81b31b36e7d776d93dc1
• https://git.kernel.org/stable/c/342debc12183b51773b3345ba267e9263bdfaaef
• https://git.kernel.org/stable/c/4d55144b12e742404bb3f8fee6038bafbf45619d
• https://git.kernel.org/stable/c/7a742a9506849d1c1aa71e36c89855ceddc7d58e
• https://git.kernel.org/stable/c/829c49b6b2ff45b043739168fd1245e4e1a91a30

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