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Vulnerability record · CVE-2026-31399 · published 3 April 2026

CVE-2026-31399: Linux kernel use after free vulnerability

Linux · Linux Kernel

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().

7.8 CVSS 3.1 High EPSS 0.17% · top 94.2% CWE-416 · Use after free
7.8CVSS 3.1 base score
0.17%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
24 Jul 2026Last modified by NVD

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/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/2c638259ad750833fd46a0cf57672a618542d84c Patch
https://git.kernel.org/stable/c/6fc36c2a925ceaba203eb13d75a8f0879a2c121b Patch
https://git.kernel.org/stable/c/84af19855d1abdee3c9d57c0684e2868e391793c Patch
https://git.kernel.org/stable/c/9a0fb16ba5b372465a3a1ecd761c6fa911a4ab4d Patch
https://git.kernel.org/stable/c/a226e5b49e5fe8c98b14f8507de670189d191348 Patch
https://git.kernel.org/stable/c/a36cf138500e56f50db9f9a33222df6969b38326 Patch
https://git.kernel.org/stable/c/a8aec14230322ed8f1e8042b6d656c1631d41163 Patch
https://git.kernel.org/stable/c/e48bf8f1d2b12c1c5ba1f609edbd4cde5dadc20e Patch

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Source: NIST National Vulnerability Database (record CVE-2026-31399), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.