CVE-2026-43281
mailbox: Prevent out-of-bounds access in fw_mbox_index_xlate()
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.
INFO
Published Date :
May 6, 2026, 12:16 p.m.
Last Modified :
June 1, 2026, 5:17 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update the Linux kernel.
- Ensure #mbox-cells is at least 1 in device tree.
- Provide fw_xlate and of_xlate function pointers if possible.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-43281.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-43281 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-43281
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-43281 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-43281 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 01, 2026
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/2c7ff651ec6b660c7c96a36db9328b3232f555d8 Added Reference https://git.kernel.org/stable/c/ec0874447895b994182a962d2fee9ef075de5efd -
Initial Analysis by [email protected]
May. 08, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H Added CWE CWE-125 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:3.18:-:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.130 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.77 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.16 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 6.19.6 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 3.18.1 up to (excluding) 6.1.167 *cpe:2.3:o:linux:linux_kernel:3.18:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:3.18:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:3.18:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:3.18:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:3.18:rc6:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:3.18:rc7:*:*:*:*:*:* Added Reference Type kernel.org: https://git.kernel.org/stable/c/01d9a8c2615d436b2b30c19c1afe9fcd5726ff6d Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/2662ed331a69c0b551f78af58f12eb629a89a36f Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/31c4c67dec3362094a6747a171a4848e98542265 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/4caae8168d1b808c7d4ff481295292e3f97f90fb Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/f50b39fd7c72a8734153644ee945ca0d8b2e65ab Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/fcd7f96c783626c07ee3ed75fa3739a8a2052310 Types: Patch -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 06, 2026
Action Type Old Value New Value Added 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. Added Reference https://git.kernel.org/stable/c/01d9a8c2615d436b2b30c19c1afe9fcd5726ff6d Added Reference https://git.kernel.org/stable/c/2662ed331a69c0b551f78af58f12eb629a89a36f Added Reference https://git.kernel.org/stable/c/31c4c67dec3362094a6747a171a4848e98542265 Added Reference https://git.kernel.org/stable/c/4caae8168d1b808c7d4ff481295292e3f97f90fb Added Reference https://git.kernel.org/stable/c/f50b39fd7c72a8734153644ee945ca0d8b2e65ab Added Reference https://git.kernel.org/stable/c/fcd7f96c783626c07ee3ed75fa3739a8a2052310