UBUNTU-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().
02 / AFFECTED SOFTWARE
Affected packages
50 explicit affected versions
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23 explicit affected versions
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66 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
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().
05 / REFERENCES
Further evidence
- https://git.kernel.org/linus/342debc12183b51773b3345ba267e9263bdfaaef
- 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/829c49b6b2ff45b043739168fd1245e4e1a91a30
- https://git.kernel.org/stable/c/a57fe60ef4cf96bfbb6b58397ec28bdb5a5c6b31
- https://git.kernel.org/stable/c/e73c838c80dccb9e4f19becc11d9f3cb4a27d483
- https://ubuntu.com/security/CVE-2025-37798
- https://ubuntu.com/security/notices/USN-7594-1
- https://ubuntu.com/security/notices/USN-7594-2
- https://ubuntu.com/security/notices/USN-7594-3
- https://ubuntu.com/security/notices/USN-7607-1
- https://ubuntu.com/security/notices/USN-7607-2
- https://ubuntu.com/security/notices/USN-7607-3
- https://ubuntu.com/security/notices/USN-7608-1
- https://ubuntu.com/security/notices/USN-7608-2
- https://ubuntu.com/security/notices/USN-7608-3
- https://ubuntu.com/security/notices/USN-7608-4
- https://ubuntu.com/security/notices/USN-7608-5
- https://ubuntu.com/security/notices/USN-7608-6
- https://ubuntu.com/security/notices/USN-7608-7
- https://ubuntu.com/security/notices/USN-7609-1
- https://ubuntu.com/security/notices/USN-7609-2
- https://ubuntu.com/security/notices/USN-7609-3
- https://ubuntu.com/security/notices/USN-7609-4
- https://ubuntu.com/security/notices/USN-7609-5
- https://ubuntu.com/security/notices/USN-7610-1
- https://ubuntu.com/security/notices/USN-7610-2
- https://ubuntu.com/security/notices/USN-7610-3
- https://ubuntu.com/security/notices/USN-7627-1
- https://ubuntu.com/security/notices/USN-7627-2
- https://ubuntu.com/security/notices/USN-7628-1
- https://ubuntu.com/security/notices/USN-7653-1
- https://ubuntu.com/security/notices/USN-7655-1
- https://ubuntu.com/security/notices/USN-7671-1
- https://ubuntu.com/security/notices/USN-7671-2
- https://ubuntu.com/security/notices/USN-7671-3
- https://ubuntu.com/security/notices/USN-7686-1
- https://ubuntu.com/security/notices/USN-7712-1
- https://ubuntu.com/security/notices/USN-7712-2
- https://www.cve.org/CVERecord?id=CVE-2025-37798