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 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.
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.
Vendor
Product
CWE
Yayın Tarihi
2025-04-18 07:15:43
Güncelleme
2025-11-06 21:35:04
Source Identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
KEV Date Added
-
Kategoriler
Referanslar
https://git.kernel.org/stable/c/034b293bf17c124fec0f0e663f81203b00aa7a50
https://git.kernel.org/stable/c/1284733bab736e598341f1d3f3b94e2a322864a8
https://git.kernel.org/stable/c/1dcc144c322a8d526b791135604c0663f1af9d85
https://git.kernel.org/stable/c/2286770b07cb5268c03d11274b8efd43dff0d380
https://git.kernel.org/stable/c/2f35b7673a3aa3d09b3eb05811669622ebaa98ca
https://git.kernel.org/stable/c/32ee79682315e6d3c99947b3f38b078a09a66919
https://git.kernel.org/stable/c/7abc8318ce0712182bf0783dcfdd9a6a8331160e
https://git.kernel.org/stable/c/864ca690ff135078d374bd565b9872f161c614bc
https://git.kernel.org/stable/c/ce8fe975fd99b49c29c42e50f2441ba53112b2e8
https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html