CVE-2026-43281
mailbox: Prevent out-of-bounds access in fw_mbox_index_xlate()
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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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- https://git.kernel.org/stable/c/2662ed331a69c0b551f78af58f12eb629a89a36f
- https://git.kernel.org/stable/c/31c4c67dec3362094a6747a171a4848e98542265
- https://git.kernel.org/stable/c/01d9a8c2615d436b2b30c19c1afe9fcd5726ff6d
- https://git.kernel.org/stable/c/4caae8168d1b808c7d4ff481295292e3f97f90fb
- https://git.kernel.org/stable/c/f50b39fd7c72a8734153644ee945ca0d8b2e65ab
References (8)
CVSS
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- NONE
- Availability
- HIGH
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