# CVE-2026-46288: of: unittest: fix use-after-free in of\_unittest\_changeset()

- Severity: CVSS 8.4 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Published: 2026-06-08 · Updated: 2026-08-05

## Affected

- Linux: version range not reported
- Linux: 6.12

## Description

In the Linux kernel, the following vulnerability has been resolved: of: unittest: fix use-after-free in of_unittest_changeset() The variable 'parent' is assigned the value of 'nchangeset' earlier in the function, meaning both point to the same struct device_node. The call to of_node_put(nchangeset) can decrement the reference count to zero and free the node if there are no other holders. After that, the code still uses 'parent' to check for the presence of a property and to read a string property, leading to a use-after-free. Fix this by moving the of_node_put() call after the last access to 'parent', avoiding the UAF.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory per the references below.
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## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/37318d1a27c9cc5a70d3cd7e49e30ec86f2b8ca1
- https://git.kernel.org/stable/c/7f0f0926f3010b10cff5e93446258f971e42f2fd
- https://git.kernel.org/stable/c/6fdad20b7975bdc32e85b45f8f7c640f6687b81f
- https://git.kernel.org/stable/c/faecdd423c27f0d6090156a435ba9dbbac0eaddb

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Page: https://cve.now/CVE-2026-46288
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