CVE-2026-43281

Severity CVSS v4.0:

Pending analysis

Type:

CWE-125 Out-of-bounds Read

Publication date:

06/05/2026

Last modified:

08/05/2026

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 = ;` 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.

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.10 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): None
Availability (A): High

Base Score 3.x

7.10

Severity 3.x

HIGH

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:linux:linux_kernel::::::::	3.18.1 (including)	6.1.167 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.2 (including)	6.6.130 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.7 (including)	6.12.77 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.13 (including)	6.18.16 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.19 (including)	6.19.6 (excluding)
cpe:2.3:o:linux:linux_kernel:3.18:-::::::
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::::::

To consult the complete list of CPE names with products and versions, see this page

CVE-2026-43281

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools