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().
Fix
Patch, vendor advisory and mitigation references on NVD 9
- https://git.kernel.org/stable/c/2f9761a94bae33d26e6a81b31b36e7d776d93dc1 Patch
- https://git.kernel.org/stable/c/342debc12183b51773b3345ba267e9263bdfaaef Patch
- https://git.kernel.org/stable/c/4d55144b12e742404bb3f8fee6038bafbf45619d Patch
- https://git.kernel.org/stable/c/7a742a9506849d1c1aa71e36c89855ceddc7d58e Patch
- https://git.kernel.org/stable/c/829c49b6b2ff45b043739168fd1245e4e1a91a30 Patch
- https://git.kernel.org/stable/c/a57fe60ef4cf96bfbb6b58397ec28bdb5a5c6b31 Patch
- https://git.kernel.org/stable/c/cc71a757da78dd4aa1b4a9b19cb011833730ccf2 Patch
- https://git.kernel.org/stable/c/e73c838c80dccb9e4f19becc11d9f3cb4a27d483 Patch
- https://git.kernel.org/stable/c/eda741fe155ddf5ecd2dd3bfbd4fc3c0c7dbb450 Patch
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 7.8 · linux, debianNVD modified 2026-10-15 22:18
Affected (CPE criteria) 3
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.15:rc1:*:*:*:*:*:*cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
References 11
- https://git.kernel.org/stable/c/2f9761a94bae33d26e6a81b31b36e7d776d93dc1 Patch
- https://git.kernel.org/stable/c/342debc12183b51773b3345ba267e9263bdfaaef Patch
- https://git.kernel.org/stable/c/4d55144b12e742404bb3f8fee6038bafbf45619d Patch
- https://git.kernel.org/stable/c/7a742a9506849d1c1aa71e36c89855ceddc7d58e Patch
- https://git.kernel.org/stable/c/829c49b6b2ff45b043739168fd1245e4e1a91a30 Patch
- https://git.kernel.org/stable/c/a57fe60ef4cf96bfbb6b58397ec28bdb5a5c6b31 Patch
- https://git.kernel.org/stable/c/cc71a757da78dd4aa1b4a9b19cb011833730ccf2 Patch
- https://git.kernel.org/stable/c/e73c838c80dccb9e4f19becc11d9f3cb4a27d483 Patch
- https://git.kernel.org/stable/c/eda741fe155ddf5ecd2dd3bfbd4fc3c0c7dbb450 Patch
- https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html Issue Tracking, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html Issue Tracking, Third Party Advisory