Out-of-bounds read in Linux kernel - CVE-2026-46122
Published: May 29, 2026
Vulnerability identifier: #VU133076
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-46122
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local attacker to disclose sensitive information.
The vulnerability exists due to an out-of-bounds read in b43_rx() when processing firmware-provided key index values. A local attacker can supply an invalid key index to disclose sensitive information.
The issue occurs because the firmware-controlled key index can exceed the dev->key[] array size of 58 entries.
How to mitigate CVE-2026-46122
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/1e9e55cf66f0fa4799f4d86ef3aaba8e606b5c14
- https://git.kernel.org/stable/c/1f4f78bf8549e6ac4f04fba4176854f3a6e0c332
- https://git.kernel.org/stable/c/219ba67e69e49681e48c822d6eaafb5def032f34
- https://git.kernel.org/stable/c/c3d7b90dc95020cd9282c4630e402fe224f7644e
- https://git.kernel.org/stable/c/d7029879bafdac2006c67553807d122283dc6cbf