CVE-2026-45989 Details
Description
In the Linux kernel, the following vulnerability has been resolved: of: unittest: fix use-after-free in testdrv_probe() The function testdrv_probe() retrieves the device_node from the PCI device, applies an overlay, and then immediately calls of_node_put(dn). This releases the reference held by the PCI core, potentially freeing the node if the reference count drops to zero. Later, the same freed pointer 'dn' is passed to of_platform_default_populate(), leading to a use-after-free. The reference to pdev->dev.of_node is owned by the device model and should not be released by the driver. Remove the erroneous of_node_put() to prevent premature freeing.
A use-after-free vulnerability has been identified in the Linux kernel's unittest component, specifically within the PCI driver management. The issue arises in the 'testdrv_probe()' function, which improperly releases a reference to a device node retrieved from a PCI device. This premature release can free the node if the reference count drops to zero, leading to a use-after-free condition when the freed pointer is later accessed. The vulnerability affects the Linux kernel stable tree.
The vulnerability has been fixed in the Linux kernel. Users should upgrade to the latest version of the stable Linux kernel where this issue has been addressed.
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
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/07fd339b2c253205794bea5d9b4b7548a4546c56 | kernel.org | Patch |
| https://git.kernel.org/stable/c/0ba03e06f037df704d9b032e36d417633e2326bc | kernel.org | Patch |
| https://git.kernel.org/stable/c/5b6122a67a295f8a08b7c18d908a1bd974dfaec8 | kernel.org | Patch |
| https://git.kernel.org/stable/c/6b2023286d2c6ed3bf964fb92e34c9c14d42eb69 | kernel.org | Patch |
| https://git.kernel.org/stable/c/d68347b07b9801791c9eaab8f772770b52b8cd5c | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-416 | Use After Free | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 6.6, < 6.6.140 >= 6.7, < 6.12.86 >= 6.13, < 6.18.27 >= 6.19, < 7.0.4 |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| Jun 16, 2026 | Initial Analysis | [email protected] |
| May 27, 2026 | New CVE Received | kernel.org |