CVE-2025-38212
Description
In the Linux kernel, the following vulnerability has been resolved: ipc: fix to protect IPCS lookups using RCU syzbot reported that it discovered a use-after-free vulnerability, [0] [0]: https://lore.kernel.org/all/67af13f8.050a0220.21dd3.0038.GAE@google.com/ idr_for_each() is protected by rwsem, but this is not enough. If it is not protected by RCU read-critical region, when idr_for_each() calls radix_tree_node_free() through call_rcu() to free the radix_tree_node structure, the node will be freed immediately, and when reading the next node in radix_tree_for_each_slot(), the already freed memory may be read. Therefore, we need to add code to make sure that idr_for_each() is protected within the RCU read-critical region when we call it in shm_destroy_orphaned().
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
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | fixed | 6.1.147-1 |
| debian | bullseye | fixed | 5.10.244-1 |
| debian | forky | fixed | 6.12.35-1 |
| debian | sid | fixed | 6.12.35-1 |
| debian | trixie | fixed | 6.12.35-1 |
| linux-kernel | affected | 5.4.295 | |
| debian | 11.0 | affected | |
References
- https://git.kernel.org/stable/c/5180561afff8e0f029073c8c8117c95c6512d1f9
- https://git.kernel.org/stable/c/5f1e1573bf103303944fd7225559de5d8297539c
- https://git.kernel.org/stable/c/68c173ea138b66d7dd1fd980c9bc578a18e11884
- https://git.kernel.org/stable/c/74bc813d11c30e28fc5261dc877cca662ccfac68
- https://git.kernel.org/stable/c/78297d53d3878d43c1d627d20cd09f611fa4b91d
- https://git.kernel.org/stable/c/b0b6bf90ce2699a574b3683e22c44d0dcdd7a057
- https://git.kernel.org/stable/c/b968ba8bfd9f90914957bbbd815413bf6a98eca7
- https://git.kernel.org/stable/c/d66adabe91803ef34a8b90613c81267b5ded1472
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html
- https://www.suse.com/security/cve/CVE-2025-38212.html
- https://security-tracker.debian.org/tracker/CVE-2025-38212
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.