CVE-2026-43281

Summary

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_xlatefunction 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 Software

VendorProductVersion RangeStatus
LinuxLinux2b6d83e2b8b7de82331a6a1dcd64b51020a6031c < 2c7ff651ec6b660c7c96a36db9328b3232f555d8affected
LinuxLinux2b6d83e2b8b7de82331a6a1dcd64b51020a6031c < ec0874447895b994182a962d2fee9ef075de5efdaffected
LinuxLinux2b6d83e2b8b7de82331a6a1dcd64b51020a6031c < 2662ed331a69c0b551f78af58f12eb629a89a36faffected
LinuxLinux2b6d83e2b8b7de82331a6a1dcd64b51020a6031c < 31c4c67dec3362094a6747a171a4848e98542265affected
LinuxLinux2b6d83e2b8b7de82331a6a1dcd64b51020a6031c < 01d9a8c2615d436b2b30c19c1afe9fcd5726ff6daffected
LinuxLinux2b6d83e2b8b7de82331a6a1dcd64b51020a6031c < 4caae8168d1b808c7d4ff481295292e3f97f90fbaffected
LinuxLinux2b6d83e2b8b7de82331a6a1dcd64b51020a6031c < f50b39fd7c72a8734153644ee945ca0d8b2e65abaffected
LinuxLinux2b6d83e2b8b7de82331a6a1dcd64b51020a6031c < fcd7f96c783626c07ee3ed75fa3739a8a2052310affected
LinuxLinux3.18affected
LinuxLinux0 < 3.18unaffected
LinuxLinux5.10.258 <= 5.10.*unaffected
LinuxLinux5.15.209 <= 5.15.*unaffected
LinuxLinux6.1.167 <= 6.1.*unaffected
LinuxLinux6.6.130 <= 6.6.*unaffected
LinuxLinux6.12.77 <= 6.12.*unaffected
LinuxLinux6.18.16 <= 6.18.*unaffected
LinuxLinux6.19.6 <= 6.19.*unaffected
LinuxLinux7.0 <= *unaffected

Weaknesses

References