CVE-2025-38477

MEDIUM EPSS 1.9%
Published Jul 28, 202511mo ago · Modified Jun 17, 20261w ago
4.7 CVSS 3.1
Medium
Find Similar
Published Jul 28, 2025 11mo ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: net/sched: sch_qfq: Fix race condition on qfq_aggregate A race condition can occur when 'agg' is modified in qfq_change_agg (called during qfq_enqueue) while other threads access it concurrently. For example, qfq_dump_class may trigger a NULL dereference, and qfq_delete_class may cause a use-after-free. This patch addresses the issue by: 1. Moved qfq_destroy_class into the critical section. 2. Added sch_tree_lock protection to qfq_dump_class and qfq_dump_class_stats.

CVSS Details

Base Score
4.7
Exploitability
1.0
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity High
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
1.9% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-362

Affected Products 14

VendorProductVersionRange
linuxlinux_kernel*≥3.8  –  <5.4.297
linuxlinux_kernel*≥5.5  –  <5.10.241
linuxlinux_kernel*≥5.11  –  <5.15.190
linuxlinux_kernel*≥5.16  –  <6.1.147
linuxlinux_kernel*≥6.2  –  <6.6.100
linuxlinux_kernel*≥6.7  –  <6.12.40
linuxlinux_kernel*≥6.13  –  <6.15.8
linuxlinux_kernel6.16any
linuxlinux_kernel6.16any
linuxlinux_kernel6.16any
linuxlinux_kernel6.16any
linuxlinux_kernel6.16any
linuxlinux_kernel6.16any
debiandebian_linux11.0any

References 11

  • cert-portal.siemens.com https://cert-portal.siemens.com/productcert/html/ssa-082556.html
  • git.kernel.org https://git.kernel.org/stable/c/466e10194ab81caa2ee6a332d33ba16bcceeeba6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5e28d5a3f774f118896aec17a3a20a9c5c9dfc64
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a6d735100f602c830c16d69fb6d780eebd8c9ae1
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/aa7a22c4d678bf649fd3a1d27debec583563414d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c000a3a330d97f6c073ace5aa5faf94b9adb4b79
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c6df794000147a3a02f79984aada4ce83f8d0a1e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d841aa5518508ab195b6781ad0d73ee378d713dd
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/fbe48f06e64134dfeafa89ad23387f66ebca3527
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
    Mailing ListThird Party Advisory
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
    Mailing ListThird Party Advisory

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/466e10194ab81caa2ee6a332d33ba16bcceeeba6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5e28d5a3f774f118896aec17a3a20a9c5c9dfc64
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a6d735100f602c830c16d69fb6d780eebd8c9ae1
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/aa7a22c4d678bf649fd3a1d27debec583563414d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c000a3a330d97f6c073ace5aa5faf94b9adb4b79
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c6df794000147a3a02f79984aada4ce83f8d0a1e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d841aa5518508ab195b6781ad0d73ee378d713dd
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/fbe48f06e64134dfeafa89ad23387f66ebca3527
    Patch