Integer overflow in Linux kernel - CVE-2026-74504
Published: August 16, 2026
Vulnerability identifier: #VU143275
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-2026-74504
CWE-ID: CWE-190
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 integer overflow in initialize_timer() when processing a userspace-driven ALSA timer bound to a sequencer queue. A local user can create a timer with a crafted hardware resolution value to cause a denial of service.
Exploitation is reachable by a user with access to /dev/snd/timer and /dev/snd/seq, and the fault can leave a spinlock held while interrupts are disabled, hanging the CPU.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-74504
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