CVE-2026-45989

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux26409dd045892904b059dc411403e9c8ce7543ca < 0ba03e06f037df704d9b032e36d417633e2326bcaffected
LinuxLinux26409dd045892904b059dc411403e9c8ce7543ca < d68347b07b9801791c9eaab8f772770b52b8cd5caffected
LinuxLinux26409dd045892904b059dc411403e9c8ce7543ca < 5b6122a67a295f8a08b7c18d908a1bd974dfaec8affected
LinuxLinux26409dd045892904b059dc411403e9c8ce7543ca < 6b2023286d2c6ed3bf964fb92e34c9c14d42eb69affected
LinuxLinux26409dd045892904b059dc411403e9c8ce7543ca < 07fd339b2c253205794bea5d9b4b7548a4546c56affected
LinuxLinux6.6affected
LinuxLinux0 < 6.6unaffected
LinuxLinux6.6.140 <= 6.6.*unaffected
LinuxLinux6.12.86 <= 6.12.*unaffected
LinuxLinux6.18.27 <= 6.18.*unaffected
LinuxLinux7.0.4 <= 7.0.*unaffected
LinuxLinux7.1 <= *unaffected

Weaknesses

References