CVE-2026-31399
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().
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.12%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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().
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.12% probability · 2th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/2c638259ad750833fd46a0cf57672a618542d84cPatch
- https://git.kernel.org/stable/c/6fc36c2a925ceaba203eb13d75a8f0879a2c121bPatch
- https://git.kernel.org/stable/c/84af19855d1abdee3c9d57c0684e2868e391793cPatch
- https://git.kernel.org/stable/c/9a0fb16ba5b372465a3a1ecd761c6fa911a4ab4dPatch
- https://git.kernel.org/stable/c/a226e5b49e5fe8c98b14f8507de670189d191348Patch
- https://git.kernel.org/stable/c/a36cf138500e56f50db9f9a33222df6969b38326Patch
- https://git.kernel.org/stable/c/a8aec14230322ed8f1e8042b6d656c1631d41163Patch
- https://git.kernel.org/stable/c/e48bf8f1d2b12c1c5ba1f609edbd4cde5dadc20ePatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.