Use of Uninitialized Variable in Linux kernel - CVE-2026-74500
Published: August 16, 2026
Vulnerability identifier: #VU143290
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-74500
CWE-ID: CWE-457
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to disclose sensitive information.
The vulnerability exists due to uninitialized memory in snd_rme_digiface_read_status() when handling a short vendor control-IN transfer from a USB device. A local user can trigger a short read and read the exposed data through /dev/snd/controlC* to disclose sensitive information.
The issue affects the RME Digiface status controls and can expose the full 16-byte status frame to user space.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-74500
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
linux (Debian package) - update to 6.12.105-1
linux (Debian package) - update to 6.12.105-1