CVE-2025-38637

MEDIUM

Linux Kernel < 5.4.292 - Reachable Assertion

Title source: rule
STIX 2.1

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.

Scores

CVSS v3 5.5
EPSS 0.0010
EPSS Percentile 26.6%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-617
Status published
Products (10)
debian/debian_linux 11.0
linux/Kernel 4.19.0 - 5.4.292linux
linux/Kernel 5.11.0 - 5.15.180linux
linux/Kernel 5.16.0 - 6.1.134linux
linux/Kernel 5.5.0 - 5.10.236linux
linux/Kernel 6.13.0 - 6.13.11linux
linux/Kernel 6.14.0 - 6.14.2linux
linux/Kernel 6.2.0 - 6.6.87linux
linux/Kernel 6.7.0 - 6.12.23linux
linux/linux_kernel 4.19 - 5.4.292
Published Apr 18, 2025
Tracked Since Feb 18, 2026