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.

• 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 • linux linux kernel 6.17 • debian debian linux 11.0