CVE-2025-38193

MEDIUM EPSS 5.8%
Published Jul 4, 202512mo ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Jul 4, 2025 12mo ago
Last Modified Jun 17, 2026 2w ago

Description

In the Linux kernel, the following vulnerability has been resolved: net_sched: sch_sfq: reject invalid perturb period Gerrard Tai reported that SFQ perturb_period has no range check yet, and this can be used to trigger a race condition fixed in a separate patch. We want to make sure ctl->perturb_period * HZ will not overflow and is positive. tc qd add dev lo root sfq perturb -10 # negative value : error Error: sch_sfq: invalid perturb period. tc qd add dev lo root sfq perturb 1000000000 # too big : error Error: sch_sfq: invalid perturb period. tc qd add dev lo root sfq perturb 2000000 # acceptable value tc -s -d qd sh dev lo qdisc sfq 8005: root refcnt 2 limit 127p quantum 64Kb depth 127 flows 128 divisor 1024 perturb 2000000sec Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0) backlog 0b 0p requeues 0

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
5.8% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-190 Integer Overflow or Wraparound Numeric Error

Affected Products 14

VendorProductVersionRange
linuxlinux_kernel*≥2.6.13  –  <5.4.297
linuxlinux_kernel*≥5.5  –  <5.10.240
linuxlinux_kernel*≥5.11  –  <5.15.186
linuxlinux_kernel*≥5.16  –  <6.1.142
linuxlinux_kernel*≥6.2  –  <6.6.95
linuxlinux_kernel*≥6.7  –  <6.12.35
linuxlinux_kernel*≥6.13  –  <6.15.4
linuxlinux_kernel2.6.12any
linuxlinux_kernel2.6.12any
linuxlinux_kernel2.6.12any
linuxlinux_kernel2.6.12any
linuxlinux_kernel2.6.12any
linuxlinux_kernel6.16any
debiandebian_linux11.0any

References 10

  • git.kernel.org https://git.kernel.org/stable/c/0357da9149eac621f39e235a135ebf155f01f7c3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/2254d038dab9c194fe6a4b1ce31034f42e91a6e5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/590b2d7d0beadba2aa576708a05a05f0aae39295
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7ca52541c05c832d32b112274f81a985101f9ba8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/956b5aebb349449b38d920d444ca1392d43719d1
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b11a50544af691b787384089b68f740ae20a441b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e0936ff56be4e08ad5b60ec26971eae0c40af305
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f9b97d466e6026ccbdda30bb5b71965b67ccbc82
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
    Third Party Advisory
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
    Third Party Advisory

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/0357da9149eac621f39e235a135ebf155f01f7c3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/2254d038dab9c194fe6a4b1ce31034f42e91a6e5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/590b2d7d0beadba2aa576708a05a05f0aae39295
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7ca52541c05c832d32b112274f81a985101f9ba8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/956b5aebb349449b38d920d444ca1392d43719d1
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b11a50544af691b787384089b68f740ae20a441b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e0936ff56be4e08ad5b60ec26971eae0c40af305
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f9b97d466e6026ccbdda30bb5b71965b67ccbc82
    Patch