CVE-2025-37798
codel: remove sch->q.qlen check before qdisc_tree_reduce_backlog()
HIGH 7.8EPSS 0.2%
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 toremove the check of qlen!=0 from both fq_codel_dequeue() andcodel_qdisc_dequeue().
- Affected
- Linux
- CVSS v3.1 NVD
- 7.8 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS
- 0.23% chance of exploitation in the next 30 days, 13th percentile
- Published
- 2025-05-02
- Updated
- 2026-10-15
Exploit collections (1)
- linux/kernelctf/CVE-2025-37798_lts_cos_mitigationgoogle/security-research
Security advisories
- https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
- 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
- https://git.kernel.org/stable/c/a57fe60ef4cf96bfbb6b58397ec28bdb5a5c6b31
- https://git.kernel.org/stable/c/cc71a757da78dd4aa1b4a9b19cb011833730ccf2
- https://git.kernel.org/stable/c/e73c838c80dccb9e4f19becc11d9f3cb4a27d483
- https://git.kernel.org/stable/c/eda741fe155ddf5ecd2dd3bfbd4fc3c0c7dbb450