High 7.8Published May 27, 2026

CVE-2026-45989of: unittest: fix use-after-free in testdrv_probe()

Updated under an hour ago (Oct 26, 2026, 12:50 PM ET)

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Exploited in the last 30 days

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.

CVSS: 7.8 HIGH (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: Jun 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	26409dd045892904b059dc411403e9c8ce7543ca builds before 0ba03e06f037df704d9b032e36d417633e2326bc; from 26409dd045892904b059dc411403e9c8ce7543ca before d68347b07b9801791c9eaab8f772770b52b8cd5c; 26409dd045892904b059dc411403e9c8ce7543ca builds before 5b6122a67a295f8a08b7c18d908a1bd974dfaec8; 26409dd045892904b059dc411403e9c8ce7543ca builds before 6b2023286d2c6ed3bf964fb92e34c9c14d42eb69; 26409dd045892904b059dc411403e9c8ce7543ca builds before 07fd339b2c253205794bea5d9b4b7548a4546c56	CNA record
linux linux_kernel linux:linux_kernel	from 6.6 before 6.6.140; from 6.7 before 6.12.86; from 6.13 before 6.18.27; from 6.19 before 7.0.4	NVD

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.