CVE-2026-31399 Details
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().
A use-after-free vulnerability has been identified in the Linux kernel's NVDIMM bus driver, specifically in the asynchronous device registration process. This issue arises when the 'device_add()' function fails, causing the reference count of the device to drop to zero before the parent device pointer can be accessed. As a result, the parent pointer is left dangling, leading to a use-after-free condition. The vulnerability affects several versions of the Linux kernel.
Users can upgrade to the latest version of the Linux kernel where this vulnerability has been fixed. Instructions for downloading the latest kernel version can be found on the official Linux kernel website.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/2c638259ad750833fd46a0cf57672a618542d84c | kernel.org | Patch |
| https://git.kernel.org/stable/c/6fc36c2a925ceaba203eb13d75a8f0879a2c121b | kernel.org | Patch |
| https://git.kernel.org/stable/c/84af19855d1abdee3c9d57c0684e2868e391793c | kernel.org | Patch |
| https://git.kernel.org/stable/c/9a0fb16ba5b372465a3a1ecd761c6fa911a4ab4d | kernel.org | Patch |
| https://git.kernel.org/stable/c/a226e5b49e5fe8c98b14f8507de670189d191348 | kernel.org | Patch |
| https://git.kernel.org/stable/c/a36cf138500e56f50db9f9a33222df6969b38326 | kernel.org | Patch |
| https://git.kernel.org/stable/c/a8aec14230322ed8f1e8042b6d656c1631d41163 | kernel.org | Patch |
| https://git.kernel.org/stable/c/e48bf8f1d2b12c1c5ba1f609edbd4cde5dadc20e | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-416 | Use After Free | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 4.4.164, < 4.5 >= 4.9.137, < 4.10 >= 4.14.81, < 4.15 >= 4.18.19, < 4.19 >= 4.19.2, < 5.10.253 >= 5.11, < 5.15.203 >= 5.16, < 6.1.167 >= 6.2, < 6.6.130 >= 6.7, < 6.12.78 >= 6.13, < 6.18.20 >= 6.19, < 6.19.10 7.0 rc1 7.0 rc2 7.0 rc3 7.0 rc4 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 24, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | kernel.org |
| May 20, 2026 | Initial Analysis | [email protected] |
| Apr 18, 2026 | CVE Modified | kernel.org |
| Apr 3, 2026 | New CVE Received | kernel.org |