Vulnerability Database

318,206

Total vulnerabilities in the database

CVE-2025-39826

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.

  • Published: Sep 16, 2025
  • Updated: Jan 17, 2026
  • CVE: CVE-2025-39826
  • Severity: High
  • Exploit:

CVSS v3:

  • Severity: High
  • Score: 7
  • AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CWEs:

Software From Fixed in
linux / linux_kernel 2.6.12.1 6.1.150
linux / linux_kernel 6.2 6.6.104
linux / linux_kernel 6.7 6.12.45
linux / linux_kernel 6.13 6.16.5
linux / linux_kernel 2.6.12 2.6.12.x
linux / linux_kernel 2.6.12-rc2 2.6.12-rc2.x
linux / linux_kernel 2.6.12-rc3 2.6.12-rc3.x
linux / linux_kernel 2.6.12-rc4 2.6.12-rc4.x
linux / linux_kernel 2.6.12-rc5 2.6.12-rc5.x
linux / linux_kernel 6.17-rc1 6.17-rc1.x
linux / linux_kernel 6.17-rc2 6.17-rc2.x
linux / linux_kernel 6.17-rc3 6.17-rc3.x
debian / debian_linux 11.0 11.0.x