Improper input validation in Linux kernel - CVE-2026-46018
Published: May 28, 2026
Vulnerability identifier: #VU132468
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-46018
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 attacker to cause a denial of service.
The vulnerability exists due to improper input validation in parse_uac2_sample_rate_range() when parsing a malformed uac2 range response from a usb audio device. A local attacker can provide a specially crafted uac2 range response to cause a denial of service.
The issue can trigger repeated kernel log messages while device probing still holds register_mutex.
How to mitigate CVE-2026-46018
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/3c318f97dcc50b2e0556a1813bd6958678e881fd
- https://git.kernel.org/stable/c/4d7893a137eadb6163ea4298bf67d74b811d76ef
- https://git.kernel.org/stable/c/a0b78639ef09b2e77974a3de3b1c07f6de3c5e56
- https://git.kernel.org/stable/c/ab5ba9fd138758ddc50222264ff246b31e397abf
- https://git.kernel.org/stable/c/ba036305323814ec1f8655313b2fa6a0f7048716