Out-of-bounds read in Linux kernel - CVE-2026-64133
Published: July 20, 2026
Vulnerability identifier: #VU138496
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-64133
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 user to cause a denial of service.
The vulnerability exists due to an out-of-bounds read in the find_control() function in the ALSA asihpi driver when reading cached control information with an out-of-range control index. A local user can provide a crafted control index to cause a denial of service.
How to mitigate CVE-2026-64133
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/34d0d492a2812b9289af14bca3573a89275965b2
- https://git.kernel.org/stable/c/61c5017c64e2ac9e10b70b14b17a079dbc0a805f
- https://git.kernel.org/stable/c/7b6f8c8eb93f02a74b1de8e521c0952af10d1f43
- https://git.kernel.org/stable/c/7b7d6572145c1dab2dd9bfb550b188e5f0ff3c3f
- https://git.kernel.org/stable/c/7d107239935793995bdc6cf29bb99e180bde4c28
- https://git.kernel.org/stable/c/8778386e4387b28f2bf8425d7ffc667c6294457f
- https://git.kernel.org/stable/c/e060e21fe9cca1e5eafd8a1c597026577771e8d9
- https://git.kernel.org/stable/c/ffa29cea7bf9a4ef2ea8084967f142e0301ac670