CVE-2026-68461
Published: August 18, 2026Last modified: August 18, 2026
Description
In the Linux kernel, the following vulnerability has been resolved: device property: initialize the remaining fields of fwnode_handle in fwnode_init() If a firmware node is allocated on the stack (for instance: temporary software node whose life-time we control) or on the heap - but using a non-zeroing allocation function - and initialized using fwnode_init(), its secondary pointer will contain uninitialized memory which likely will be neither NULL nor IS_ERR() and so may end up being dereferenced (for example: in dev_to_swnode()). Set fwnode->secondary to NULL on initialization. While at it: initialize the remaining fields of struct fwnode_handle too just to be sure. [ Fix typo in commit message. - Danilo ]
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.8 |
| Attack Vector | LOCAL |
| Attack complexity | LOW |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | HIGH |
| Integrity impact | HIGH |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Fixed (6.1.182-r0) |
| 25 LTS | linux-lts | Fixed (6.12.103-r0) | |
| Stream | linux-lts | Fixed (6.18.43-r0) |
References
- https://git.kernel.org/stable/c/0198d579948322cda5178b9672d448375a32f947
- https://git.kernel.org/stable/c/173b61c9276c7b3a5fbcc63ae7aafc897fee1e18
- https://git.kernel.org/stable/c/7eba000621fff223dd7bab484d48918c7c77a307
- https://git.kernel.org/stable/c/9c86a1f930bb2ddb85f867b4736716e82a4a4683
- https://git.kernel.org/stable/c/c81e2af41de6a159837c7129a4fc444ac6e48046
- https://git.kernel.org/stable/c/c8542b68ba6ef4f61072098893a3f5b71c569b6c
- https://git.kernel.org/stable/c/f0b4e1cc8ad76baf49d898727eb52e91a4ef0544