CVE-2025-38637

MEDIUM EPSS 14.9%
Published Apr 18, 20251y ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Apr 18, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

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 Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
14.9% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-617

Affected Products 9

VendorProductVersionRange
linuxlinux_kernel*≥4.19  –  <5.4.292
linuxlinux_kernel*≥5.5  –  <5.10.236
linuxlinux_kernel*≥5.11  –  <5.15.180
linuxlinux_kernel*≥5.16  –  <6.1.134
linuxlinux_kernel*≥6.2  –  <6.6.87
linuxlinux_kernel*≥6.7  –  <6.12.23
linuxlinux_kernel*≥6.13  –  <6.13.11
linuxlinux_kernel*≥6.14  –  <6.14.2
debiandebian_linux11.0any

References 11

  • git.kernel.org https://git.kernel.org/stable/c/034b293bf17c124fec0f0e663f81203b00aa7a50
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/1284733bab736e598341f1d3f3b94e2a322864a8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/1dcc144c322a8d526b791135604c0663f1af9d85
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/2286770b07cb5268c03d11274b8efd43dff0d380
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/2f35b7673a3aa3d09b3eb05811669622ebaa98ca
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/32ee79682315e6d3c99947b3f38b078a09a66919
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7abc8318ce0712182bf0783dcfdd9a6a8331160e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/864ca690ff135078d374bd565b9872f161c614bc
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ce8fe975fd99b49c29c42e50f2441ba53112b2e8
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
    Third Party Advisory
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
    Third Party Advisory

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/034b293bf17c124fec0f0e663f81203b00aa7a50
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/1284733bab736e598341f1d3f3b94e2a322864a8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/1dcc144c322a8d526b791135604c0663f1af9d85
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/2286770b07cb5268c03d11274b8efd43dff0d380
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/2f35b7673a3aa3d09b3eb05811669622ebaa98ca
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/32ee79682315e6d3c99947b3f38b078a09a66919
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7abc8318ce0712182bf0783dcfdd9a6a8331160e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/864ca690ff135078d374bd565b9872f161c614bc
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ce8fe975fd99b49c29c42e50f2441ba53112b2e8
    Patch