Improper input validation in Linux kernel - CVE-2026-46088
Published: May 27, 2026
Vulnerability identifier: #VU132398
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-2026-46088
CWE-ID: CWE-20
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 improper buffer length validation in snd_ctl_elem_init_enum_names() when parsing enumeration names from a buffer. A local user can provide a crafted buffer with insufficient remaining length to trigger a kernel panic.
The issue is triggered on systems using CONFIG_FORTIFY_SOURCE where fortified strnlen() checks the remaining object size before the return value is examined.
How to mitigate CVE-2026-46088
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/1fbe46d2b72754d8bd580e13e59ccb5d3d0e8cb0
- https://git.kernel.org/stable/c/654c818a69c21d2bea4e8fd9eae7da865df9a5c8
- https://git.kernel.org/stable/c/82012fd3e78a14360fbc2f1a7491589896704f97
- https://git.kernel.org/stable/c/8ba0214c3dd32b8ec652947e3f2bc5b8f6e6be9e
- https://git.kernel.org/stable/c/e0da8a8cac74f4b9f577979d131f0d2b88a84487