CVE-2025-39689

HIGH EPSS 6.5%
Published Sep 5, 20259mo ago · Modified Jun 17, 20261w ago
7.8 CVSS 3.1
High
Find Similar
Published Sep 5, 2025 9mo ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: ftrace: Also allocate and copy hash for reading of filter files Currently the reader of set_ftrace_filter and set_ftrace_notrace just adds the pointer to the global tracer hash to its iterator. Unlike the writer that allocates a copy of the hash, the reader keeps the pointer to the filter hashes. This is problematic because this pointer is static across function calls that release the locks that can update the global tracer hashes. This can cause UAF and similar bugs. Allocate and copy the hash for reading the filter files like it is done for the writers. This not only fixes UAF bugs, but also makes the code a bit simpler as it doesn't have to differentiate when to free the iterator's hash between writers and readers.

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
6.5% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 10

VendorProductVersionRange
linuxlinux_kernel*≥4.12  –  <5.4.297
linuxlinux_kernel*≥5.5  –  <5.10.241
linuxlinux_kernel*≥5.11  –  <5.15.190
linuxlinux_kernel*≥5.16  –  <6.1.149
linuxlinux_kernel*≥6.2  –  <6.6.103
linuxlinux_kernel*≥6.7  –  <6.12.44
linuxlinux_kernel*≥6.13  –  <6.16.4
linuxlinux_kernel6.17any
linuxlinux_kernel6.17any
debiandebian_linux11.0any

References 12

  • cert-portal.siemens.com https://cert-portal.siemens.com/productcert/html/ssa-032379.html
  • cert-portal.siemens.com https://cert-portal.siemens.com/productcert/html/ssa-082556.html
  • git.kernel.org https://git.kernel.org/stable/c/12064e1880fc9202be75ff668205b1703d92f74f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/3b114a3282ab1a12cb4618a8f45db5d7185e784a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/64db338140d2bad99a0a8c6a118dd60b3e1fb8cb
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a40c69f4f1ed96acbcd62e9b5ff3a596f0a91309
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/bfb336cf97df7b37b2b2edec0f69773e06d11955
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c4cd93811e038d19f961985735ef7bb128078dfb
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c591ba1acd081d4980713e47869dd1cc3d963d19
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e0b6b223167e1edde5c82edf38e393c06eda1f13
    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/12064e1880fc9202be75ff668205b1703d92f74f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/3b114a3282ab1a12cb4618a8f45db5d7185e784a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/64db338140d2bad99a0a8c6a118dd60b3e1fb8cb
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a40c69f4f1ed96acbcd62e9b5ff3a596f0a91309
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/bfb336cf97df7b37b2b2edec0f69773e06d11955
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c4cd93811e038d19f961985735ef7bb128078dfb
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c591ba1acd081d4980713e47869dd1cc3d963d19
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e0b6b223167e1edde5c82edf38e393c06eda1f13
    Patch