PT-2026-30182 · Linux · Linux

Published 2026-04-03 · Updated 2026-04-03 · CVE-2026-31399

NVD

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().

Related Identifiers

CVE-2026-31399

Affected Products

Linux

References · 7

• https://nvd.nist.gov/vuln/detail/CVE-2026-31399 · Security Note
• https://git.kernel.org/stable/c/84af19855d1abdee3c9d57c0684e2868e391793c · Note
• https://git.kernel.org/stable/c/2c638259ad750833fd46a0cf57672a618542d84c · Note
• https://git.kernel.org/stable/c/e48bf8f1d2b12c1c5ba1f609edbd4cde5dadc20e · Note
• https://git.kernel.org/stable/c/a8aec14230322ed8f1e8042b6d656c1631d41163 · Note
• https://git.kernel.org/stable/c/a226e5b49e5fe8c98b14f8507de670189d191348 · Note
• https://git.kernel.org/stable/c/9a0fb16ba5b372465a3a1ecd761c6fa911a4ab4d · Note