CVE-2026-43281
Published: May 7, 2026Last modified: May 7, 2026
Description
In the Linux kernel, the following vulnerability has been resolved: mailbox: Prevent out-of-bounds access in fw_mbox_index_xlate() Although it is guided that `#mbox-cells` must be at least 1, there are many instances of `#mbox-cells = <0>;` in the device tree. If that is the case and the corresponding mailbox controller does not provide `fw_xlate` and of_xlate` function pointers, `fw_mbox_index_xlate()` will be used by default and out-of-bounds accesses could occur due to lack of bounds check in that function.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.1 |
| Attack Vector | LOCAL |
| Attack complexity | LOW |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | HIGH |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Fixed (6.1.167-r0) |
| 25 LTS | linux-lts | Fixed (6.12.80-r0) | |
| Stream | linux-lts | Fixed (6.12.80-r0) |
References
- https://git.kernel.org/stable/c/01d9a8c2615d436b2b30c19c1afe9fcd5726ff6d
- https://git.kernel.org/stable/c/2662ed331a69c0b551f78af58f12eb629a89a36f
- https://git.kernel.org/stable/c/31c4c67dec3362094a6747a171a4848e98542265
- https://git.kernel.org/stable/c/4caae8168d1b808c7d4ff481295292e3f97f90fb
- https://git.kernel.org/stable/c/f50b39fd7c72a8734153644ee945ca0d8b2e65ab
- https://git.kernel.org/stable/c/fcd7f96c783626c07ee3ed75fa3739a8a2052310