mailbox: Prevent out-of-bounds access in fw_mbox_index_xlate()
Summary
| CVE | CVE-2026-43281 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-05-06 12:16:49 UTC |
| Updated | 2026-05-08 19:13:43 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 7.1 HIGH from [email protected]
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Problem Types: CWE-125
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
NoneAvailability
HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Operating System | Linux | Linux Kernel | All | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 2b6d83e2b8b7de82331a6a1dcd64b51020a6031c 2662ed331a69c0b551f78af58f12eb629a89a36f git | Not specified |
| CNA | Linux | Linux | affected 2b6d83e2b8b7de82331a6a1dcd64b51020a6031c 31c4c67dec3362094a6747a171a4848e98542265 git | Not specified |
| CNA | Linux | Linux | affected 2b6d83e2b8b7de82331a6a1dcd64b51020a6031c 01d9a8c2615d436b2b30c19c1afe9fcd5726ff6d git | Not specified |
| CNA | Linux | Linux | affected 2b6d83e2b8b7de82331a6a1dcd64b51020a6031c 4caae8168d1b808c7d4ff481295292e3f97f90fb git | Not specified |
| CNA | Linux | Linux | affected 2b6d83e2b8b7de82331a6a1dcd64b51020a6031c f50b39fd7c72a8734153644ee945ca0d8b2e65ab git | Not specified |
| CNA | Linux | Linux | affected 2b6d83e2b8b7de82331a6a1dcd64b51020a6031c fcd7f96c783626c07ee3ed75fa3739a8a2052310 git | Not specified |
| CNA | Linux | Linux | affected 3.18 | Not specified |
| CNA | Linux | Linux | unaffected 3.18 semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.167 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.130 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.77 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.16 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.19.6 6.19.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.0 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/01d9a8c2615d436b2b30c19c1afe9fcd5726ff6d | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/4caae8168d1b808c7d4ff481295292e3f97f90fb | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/fcd7f96c783626c07ee3ed75fa3739a8a2052310 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/2662ed331a69c0b551f78af58f12eb629a89a36f | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/f50b39fd7c72a8734153644ee945ca0d8b2e65ab | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/31c4c67dec3362094a6747a171a4848e98542265 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.