CVE-2026-45989of: unittest: fix use-after-free in testdrv_probe()
- 7.8HighCVSS base score
- 0.16%Exploitation in 30 daysEPSS · top 94% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 14 days later
· 14 days later
Published
- 18 days later
· 18 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.16% · top 94% of all CVEs (14 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 26409dd045892904b059dc411403e9c8ce7543ca – < 0ba03e06f037df704d9b032e36d417633e2326bc
- affected 26409dd045892904b059dc411403e9c8ce7543ca – < d68347b07b9801791c9eaab8f772770b52b8cd5c
- affected 26409dd045892904b059dc411403e9c8ce7543ca – < 5b6122a67a295f8a08b7c18d908a1bd974dfaec8
- affected 26409dd045892904b059dc411403e9c8ce7543ca – < 6b2023286d2c6ed3bf964fb92e34c9c14d42eb69
- affected 26409dd045892904b059dc411403e9c8ce7543ca – < 07fd339b2c253205794bea5d9b4b7548a4546c56
- affected 6.6
- unaffected < 6.6
- unaffected 6.6.140 – ≤ 6.6.*
- unaffected 6.12.86 – ≤ 6.12.*
- unaffected 6.18.27 – ≤ 6.18.*
- unaffected 7.0.4 – ≤ 7.0.*
- unaffected 7.1 – ≤ *
References
References5
- https://git.kernel.org/stable/c/0ba03e06f037df704d9b032e36d417633e2326bc (opens in a new tab)
- https://git.kernel.org/stable/c/d68347b07b9801791c9eaab8f772770b52b8cd5c (opens in a new tab)
- https://git.kernel.org/stable/c/5b6122a67a295f8a08b7c18d908a1bd974dfaec8 (opens in a new tab)
- https://git.kernel.org/stable/c/6b2023286d2c6ed3bf964fb92e34c9c14d42eb69 (opens in a new tab)
- https://git.kernel.org/stable/c/07fd339b2c253205794bea5d9b4b7548a4546c56 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-32285 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-45989)Record last updated .