CVE-2025-39826
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
Linux kernel Affected 3 releases
| Version | Status | Fixed in |
|---|---|---|
| 6.17 | Affected | — |
| 2.6.12 | Affected | — |
| — | Affected | 6.1.150 |
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Debian Mixed 6 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 6.12.48-1 |
| sid | Fixed | 6.16.5-1 |
| forky | Fixed | 6.16.5-1 |
| bullseye | Fixed | 6.1.153-1~deb11u1 |
| bookworm | Fixed | 6.1.153-1 |
| 11.0 | Affected | — |
References
- https://git.kernel.org/stable/c/0085b250fcc79f900c82a69980ec2f3e1871823b
- https://git.kernel.org/stable/c/203e4f42596ede31498744018716a3db6dbb7f51
- https://git.kernel.org/stable/c/d860d1faa6b2ce3becfdb8b0c2b048ad31800061
- https://git.kernel.org/stable/c/f8c29fc437d03a98fb075c31c5be761cc8326284
- https://git.kernel.org/stable/c/fb07156cc0742ba4e93dfcc84280c011d05b301f
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
- https://cert-portal.siemens.com/productcert/html/ssa-032379.html
- https://www.suse.com/security/cve/CVE-2025-39826.html
- https://security-tracker.debian.org/tracker/CVE-2025-39826
CWEs
CWE-416
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.