7.8

CVE-2026-45989

of: unittest: fix use-after-free in testdrv_probe()

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 6.6 < 6.6.140
Linux ≫ Linux Kernel Version >= 6.7 < 6.12.86
Linux ≫ Linux Kernel Version >= 6.13 < 6.18.27
Linux ≫ Linux Kernel Version >= 6.19 < 7.0.4
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.16% 0.059
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

https://git.kernel.org/stable/c/0ba03e06f037df704d9b032e36d417633e2326bc
Patch
https://git.kernel.org/stable/c/d68347b07b9801791c9eaab8f772770b52b8cd5c
Patch
https://git.kernel.org/stable/c/5b6122a67a295f8a08b7c18d908a1bd974dfaec8
Patch
https://git.kernel.org/stable/c/6b2023286d2c6ed3bf964fb92e34c9c14d42eb69
Patch
https://git.kernel.org/stable/c/07fd339b2c253205794bea5d9b4b7548a4546c56
Patch