CVE-2025-38637
In the Linux kernel, the following vulnerability has been resolved: net_sched: skbprio: Remove overly strict queue assertions In the current implementation, skbprio enqueue/dequeue contains an assertion that fails under certain conditions when SKBPRIO…
Does this matter?
Lower severity and a low EPSS score (0.32%). Track it; it rarely justifies an emergency change on its own.
Description
In the Linux kernel, the following vulnerability has been resolved: net_sched: skbprio: Remove overly strict queue assertions In the current implementation, skbprio enqueue/dequeue contains an assertion that fails under certain conditions when SKBPRIO is used as a child qdisc under TBF with specific parameters. The failure occurs because TBF sometimes peeks at packets in the child qdisc without actually dequeuing them when tokens are unavailable. This peek operation creates a discrepancy between the parent and child qdisc queue length counters. When TBF later receives a high-priority packet, SKBPRIO's queue length may show a different value than what's reflected in its internal priority queue tracking, triggering the assertion. The fix removes this overly strict assertions in SKBPRIO, they are not necessary at all.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.32% probability · 24th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-617
- Affected
- linux/linux kernel · debian/debian linux
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/034b293bf17c124fec0f0e663f81203b00aa7a50Patch
- https://git.kernel.org/stable/c/1284733bab736e598341f1d3f3b94e2a322864a8Patch
- https://git.kernel.org/stable/c/1dcc144c322a8d526b791135604c0663f1af9d85Patch
- https://git.kernel.org/stable/c/2286770b07cb5268c03d11274b8efd43dff0d380Patch
- https://git.kernel.org/stable/c/2f35b7673a3aa3d09b3eb05811669622ebaa98caPatch
- https://git.kernel.org/stable/c/32ee79682315e6d3c99947b3f38b078a09a66919Patch
- https://git.kernel.org/stable/c/7abc8318ce0712182bf0783dcfdd9a6a8331160ePatch
- https://git.kernel.org/stable/c/864ca690ff135078d374bd565b9872f161c614bcPatch
- https://git.kernel.org/stable/c/ce8fe975fd99b49c29c42e50f2441ba53112b2e8Patch
- https://lists.debian.org/debian-lts-announce/2025/05/msg00030.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2025/05/msg00045.htmlThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.