CVE-2025-38637

Medium

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.

SeverityMedium
CVSS5.5
Exploit probability—
ProductLinux Kernel
PublishedApr 18, 2025
First seenApr 18, 2025

How to fix

Update
  • linux linux_kernel5.4.292, 5.10.236, 5.15.180, 6.1.134, 6.6.87, 6.12.23, 6.13.11, 6.14.2 or later

Affected products

ProductAffected versionsFixed in
linux linux_kernel4.19 ≤ v < 5.4.292, 5.5 ≤ v < 5.10.236, 5.11 ≤ v < 5.15.180, 5.16 ≤ v < 6.1.134, 6.2 ≤ v < 6.6.87, 6.7 ≤ v < 6.12.23, 6.13 ≤ v < 6.13.11, 6.14 ≤ v < 6.14.25.4.292, 5.10.236, 5.15.180, 6.1.134, 6.6.87, 6.12.23, 6.13.11, 6.14.2
debian debian_linux11.0—

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