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.

Score
CVSS 3.1 8.8 High
Status
Modified - 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2025-09-16
Last modified
2026-10-19
Weaknesses
CWE-416

Affected products

References

 
 
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