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CVE-2025-38637

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CVE-2025-38637

Published: Apr 18, 2025

Modified: May 11, 2026

PUBLISHED

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.

VendorProductVersions

Linux

Linux

affected
aea5f654e6b78a0c976f7a25950155932c77a53f - < 7abc8318ce0712182bf0783dcfdd9a6a8331160e
affected
aea5f654e6b78a0c976f7a25950155932c77a53f - < 1284733bab736e598341f1d3f3b94e2a322864a8
affected
aea5f654e6b78a0c976f7a25950155932c77a53f - < 32ee79682315e6d3c99947b3f38b078a09a66919
affected
aea5f654e6b78a0c976f7a25950155932c77a53f - < 1dcc144c322a8d526b791135604c0663f1af9d85
affected
aea5f654e6b78a0c976f7a25950155932c77a53f - < 864ca690ff135078d374bd565b9872f161c614bc

+4 more versions

Linux

Linux

affected
4.19
unaffected
0 - < 4.19
unaffected
5.4.292 - <= 5.4.*
unaffected
5.10.236 - <= 5.10.*
unaffected
5.15.180 - <= 5.15.*

+6 more versions

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