Out-of-bounds write in Linux kernel - CVE-2026-72261
Published: August 16, 2026
Vulnerability identifier: #VU143177
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-2026-72261
CWE-ID: CWE-787
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 out-of-bounds write in snd_sof_update_control when processing firmware-provided control data. A local user can provide inconsistent control data values to cause a denial of service.
The issue occurs because num_elems was validated against a stored size field but not against the actual ipc_control_data allocation size before memcpy.
Affected software
Linux kernel
Red Hat Enterprise Linux for Real Time
Red Hat Enterprise Linux for Real Time for NFV
kernel-rt (Red Hat package)
Red Hat Enterprise Linux for Real Time
Red Hat Enterprise Linux for Real Time for NFV
kernel-rt (Red Hat package)
How to mitigate CVE-2026-72261
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
kernel-rt (Red Hat package) - update to 4.18.0-553.167.1.rt7.508.el8_10
kernel-rt (Red Hat package) - update to 4.18.0-553.167.1.rt7.508.el8_10
External References
- https://git.kernel.org/stable/c/1dc25a3e06364f48c4ef06016852f8b82425151a
- https://git.kernel.org/stable/c/2a591bf6fd41fd14bdae689aafac4a9ee702c23c
- https://git.kernel.org/stable/c/390aa4c9339bb0ec0bc8d554e830faf93ca9d49e
- https://git.kernel.org/stable/c/d3abaedf6a58469610136d2dace1a85cddf7afcf
- https://git.kernel.org/stable/c/ecf67f1302f2080b4d241b973364aacda70ad740
- https://git.kernel.org/stable/c/ee781058cd4d71e4449f41cbe6a3b8c59daa2c51