CVE-2025-37798: codel: remove sch->q.qlen check before qdisc_tree_reduce_backlog()
First published: Fri May 02 2025(Updated: )
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().
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel |
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Reference Links
- https://git.kernel.org/stable/c/829c49b6b2ff45b043739168fd1245e4e1a91a30
- https://git.kernel.org/stable/c/2f9761a94bae33d26e6a81b31b36e7d776d93dc1
- https://git.kernel.org/stable/c/4d55144b12e742404bb3f8fee6038bafbf45619d
- https://git.kernel.org/stable/c/e73c838c80dccb9e4f19becc11d9f3cb4a27d483
- https://git.kernel.org/stable/c/a57fe60ef4cf96bfbb6b58397ec28bdb5a5c6b31
- https://git.kernel.org/stable/c/342debc12183b51773b3345ba267e9263bdfaaef
Frequently Asked Questions
What is the severity of CVE-2025-37798?
The severity of CVE-2025-37798 is classified as moderate due to the potential impact on the Linux kernel's functionality.
How do I fix CVE-2025-37798?
To fix CVE-2025-37798, update to the latest version of the Linux kernel where this vulnerability has been patched.
What is the impact of CVE-2025-37798 on Linux systems?
CVE-2025-37798 could lead to improper queue management in Linux systems, potentially affecting network performance.
Is CVE-2025-37798 actively exploited in the wild?
As of now, there is no evidence that CVE-2025-37798 is actively exploited in the wild.
Who is affected by CVE-2025-37798?
CVE-2025-37798 affects users of the Linux kernel, specifically those using configurations that involve the fq_codel queue discipline.
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