CVE-2025-39826

HIGH EPSS 3.1%
Published Sep 16, 20259mo ago · Modified Jun 17, 20262w ago
7.0 CVSS 3.1
High
Find Similar
Published Sep 16, 2025 9mo ago
Last Modified Jun 17, 2026 2w ago

Description

In the Linux kernel, the following vulnerability has been resolved: net: rose: convert 'use' field to refcount_t The 'use' field in struct rose_neigh is used as a reference counter but lacks atomicity. This can lead to race conditions where a rose_neigh structure is freed while still being referenced by other code paths. For example, when rose_neigh->use becomes zero during an ioctl operation via rose_rt_ioctl(), the structure may be removed while its timer is still active, potentially causing use-after-free issues. This patch changes the type of 'use' from unsigned short to refcount_t and updates all code paths to use rose_neigh_hold() and rose_neigh_put() which operate reference counts atomically.

CVSS Details

Base Score
7.0
Exploitability
1.0
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity High
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
3.1% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 13

VendorProductVersionRange
linuxlinux_kernel*≥2.6.12.1  –  <6.1.150
linuxlinux_kernel*≥6.2  –  <6.6.104
linuxlinux_kernel*≥6.7  –  <6.12.45
linuxlinux_kernel*≥6.13  –  <6.16.5
linuxlinux_kernel2.6.12any
linuxlinux_kernel2.6.12any
linuxlinux_kernel2.6.12any
linuxlinux_kernel2.6.12any
linuxlinux_kernel2.6.12any
linuxlinux_kernel6.17any
linuxlinux_kernel6.17any
linuxlinux_kernel6.17any
debiandebian_linux11.0any

References 7

  • cert-portal.siemens.com https://cert-portal.siemens.com/productcert/html/ssa-032379.html
  • git.kernel.org https://git.kernel.org/stable/c/0085b250fcc79f900c82a69980ec2f3e1871823b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/203e4f42596ede31498744018716a3db6dbb7f51
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d860d1faa6b2ce3becfdb8b0c2b048ad31800061
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f8c29fc437d03a98fb075c31c5be761cc8326284
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/fb07156cc0742ba4e93dfcc84280c011d05b301f
    Patch
  • 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/0085b250fcc79f900c82a69980ec2f3e1871823b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/203e4f42596ede31498744018716a3db6dbb7f51
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d860d1faa6b2ce3becfdb8b0c2b048ad31800061
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f8c29fc437d03a98fb075c31c5be761cc8326284
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/fb07156cc0742ba4e93dfcc84280c011d05b301f
    Patch