CVE-2026-43281
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.12%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.1 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
- EPSS
- 0.12% probability · 2th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-125
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/01d9a8c2615d436b2b30c19c1afe9fcd5726ff6dPatch
- https://git.kernel.org/stable/c/2662ed331a69c0b551f78af58f12eb629a89a36fPatch
- https://git.kernel.org/stable/c/2c7ff651ec6b660c7c96a36db9328b3232f555d8
- https://git.kernel.org/stable/c/31c4c67dec3362094a6747a171a4848e98542265Patch
- https://git.kernel.org/stable/c/4caae8168d1b808c7d4ff481295292e3f97f90fbPatch
- https://git.kernel.org/stable/c/ec0874447895b994182a962d2fee9ef075de5efd
- https://git.kernel.org/stable/c/f50b39fd7c72a8734153644ee945ca0d8b2e65abPatch
- https://git.kernel.org/stable/c/fcd7f96c783626c07ee3ed75fa3739a8a2052310Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.