Use-after-free in Linux kernel - CVE-2026-74505
Published: August 16, 2026
Vulnerability identifier: #VU143276
CSH Severity: Low
CVSS v4: 6.8 [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]
CVE-ID: CVE-2026-74505
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to use-after-free in the usb6fire_chip_probe function in the ALSA 6fire driver when handling a device probe error path. A local user can trigger the probe sequence with a crafted or malfunctioning USB device to cause a denial of service.
The issue occurs during early error handling in the probe phase after a pending URB is not properly aborted before resources are freed.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-74505
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
External References
- https://git.kernel.org/stable/c/11e2953d9f4c7c3d2af94a889c2d805c537d633f
- https://git.kernel.org/stable/c/2de734dcbb210bd59983e13d36988acbcc122194
- https://git.kernel.org/stable/c/49bc7741cd2761c703a292dc69245041ae8a67bd
- https://git.kernel.org/stable/c/630c8d6a93cbd9b2a207f1a67ef1fd21af098b0c
- https://git.kernel.org/stable/c/a54bf16965f896415c3337bc4fbb40fb11941d99