CVE-2026-31399
Description
In the Linux kernel, the following vulnerability has been resolved: nvdimm/bus: Fix potential use after free in asynchronous initialization Dingisoul with KASAN reports a use after free if device_add() fails in nd_async_device_register(). Commit b6eae0f61db2 ("libnvdimm: Hold reference on parent while scheduling async init") correctly added a reference on the parent device to be held until asynchronous initialization was complete. However, if device_add() results in an allocation failure the ref count of the device drops to 0 prior to the parent pointer being accessed. Thus resulting in use after free. The bug bot AI correctly identified the fix. Save a reference to the parent pointer to be used to drop the parent reference regardless of the outcome of device_add().
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 | 6.1.170-1 |
| debian | bullseye | fixed | 6.1.170-1~deb11u1 |
| debian | forky | fixed | 6.19.10-1 |
| debian | sid | fixed | 6.19.10-1 |
| debian | trixie | fixed | 6.12.85-1 |
| linux-kernel | affected | 4.5 | |
| linux-kernel | 7.0 | affected | |
References
- https://git.kernel.org/stable/c/2c638259ad750833fd46a0cf57672a618542d84c
- https://git.kernel.org/stable/c/6fc36c2a925ceaba203eb13d75a8f0879a2c121b
- https://git.kernel.org/stable/c/84af19855d1abdee3c9d57c0684e2868e391793c
- https://git.kernel.org/stable/c/9a0fb16ba5b372465a3a1ecd761c6fa911a4ab4d
- https://git.kernel.org/stable/c/a226e5b49e5fe8c98b14f8507de670189d191348
- https://git.kernel.org/stable/c/a36cf138500e56f50db9f9a33222df6969b38326
- https://git.kernel.org/stable/c/a8aec14230322ed8f1e8042b6d656c1631d41163
- https://git.kernel.org/stable/c/e48bf8f1d2b12c1c5ba1f609edbd4cde5dadc20e
- https://www.suse.com/security/cve/CVE-2026-31399.html
- https://security-tracker.debian.org/tracker/CVE-2026-31399
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.