CVE-2025-37992

MEDIUM EPSS 5.5%
Published May 26, 20251y ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published May 26, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: net_sched: Flush gso_skb list too during ->change() Previously, when reducing a qdisc's limit via the ->change() operation, only the main skb queue was trimmed, potentially leaving packets in the gso_skb list. This could result in NULL pointer dereference when we only check sch->limit against sch->q.qlen. This patch introduces a new helper, qdisc_dequeue_internal(), which ensures both the gso_skb list and the main queue are properly flushed when trimming excess packets. All relevant qdiscs (codel, fq, fq_codel, fq_pie, hhf, pie) are updated to use this helper in their ->change() routines.

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
5.5% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 13

VendorProductVersionRange
linuxlinux_kernel*≥3.5  –  <5.10.238
linuxlinux_kernel*≥5.11  –  <5.15.184
linuxlinux_kernel*≥5.16  –  <6.1.140
linuxlinux_kernel*≥6.2  –  <6.6.92
linuxlinux_kernel*≥6.7  –  <6.12.30
linuxlinux_kernel*≥6.13  –  <6.14.8
linuxlinux_kernel6.15any
linuxlinux_kernel6.15any
linuxlinux_kernel6.15any
linuxlinux_kernel6.15any
linuxlinux_kernel6.15any
linuxlinux_kernel6.15any
debiandebian_linux11.0any

References 9

  • git.kernel.org https://git.kernel.org/stable/c/2d3cbfd6d54a2c39ce3244f33f85c595844bd7b8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a7d6e0ac0a8861f6b1027488062251a8e28150fd
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d1365ca80b012d8a7863e45949e413fb61fa4861
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d3336f746f196c6a53e0480923ae93939f047b6c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d38939ebe0d992d581acb6885c1723fa83c1fb2c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ea1132ccb112f51ba749c56a912f67970c2cd542
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/fe88c7e4fc2c1cd75a278a15ffbf1689efad4e76
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html
    Third Party Advisory
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
    Third Party Advisory

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/2d3cbfd6d54a2c39ce3244f33f85c595844bd7b8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a7d6e0ac0a8861f6b1027488062251a8e28150fd
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d1365ca80b012d8a7863e45949e413fb61fa4861
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d3336f746f196c6a53e0480923ae93939f047b6c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d38939ebe0d992d581acb6885c1723fa83c1fb2c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ea1132ccb112f51ba749c56a912f67970c2cd542
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/fe88c7e4fc2c1cd75a278a15ffbf1689efad4e76
    Patch