Out-of-bounds write in Linux kernel - CVE-2026-74682
Published: August 24, 2026
Vulnerability identifier: #VU144671
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-2026-74682
CWE-ID: CWE-787
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause memory corruption.
The vulnerability exists due to an out-of-bounds write in the ALSA usb-audio endpoint handling code when processing inbound URBs for Type II capture formats after userspace sets hw_params on the stream. A local user can use a device advertising a Type II capture format to trigger an out-of-bounds write and cause memory corruption.
Only capture streams are affected.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-74682
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/0a235379825e1a6194e43861ee6658e5fc35686d
- https://git.kernel.org/stable/c/137bf034740e5a2734794908d0aff1e0bd7cee6e
- https://git.kernel.org/stable/c/6607f85242577f33d4540a0d1f4a6137f5367058
- https://git.kernel.org/stable/c/69ee44e1a23be62318189dc4b37fa4ad94053269
- https://git.kernel.org/stable/c/6af5f29af7711233ae68d3b25c15d67478468900
- https://git.kernel.org/stable/c/ca22c94bdfc22c564ca2e11c87ba4d17ebeaaa9a
- https://git.kernel.org/stable/c/d3ed4e6321bb453757044cb9e5ecb30a33f04903
- https://git.kernel.org/stable/c/f1fbb50b99311b35c2e85cc70341d62082dca4b5