Improper input validation in Linux kernel - CVE-2026-46026
Published: May 28, 2026
Vulnerability identifier: #VU132461
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-2026-46026
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 improper input validation in the qrtr nameserver lookup handling when processing NEW_LOOKUP messages over the same socket. A local user can send a flood of NEW_LOOKUP messages to cause a denial of service.
The issue is limited to local clients.
How to mitigate CVE-2026-46026
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/0dbec101a7076e9b1e4bd1876f7cf07c56ff4ce3
- https://git.kernel.org/stable/c/20855cef7e659ef84ac73251256fa530819b2346
- https://git.kernel.org/stable/c/2b930bc77e00cb27e1d6e1d497b3b596283465ef
- https://git.kernel.org/stable/c/5640227d9a21c6a8be249a10677b832e7f40dc55
- https://git.kernel.org/stable/c/76adf8f69b0bb3ab20be7c58f5d555027332d113