NULL pointer dereference in Linux kernel - CVE-2026-72257
Published: August 16, 2026
Vulnerability identifier: #VU143184
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-2026-72257
CWE-ID: CWE-476
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 a NULL pointer dereference in graph_callback in the q6apm ASoC component when handling late DSP buffer-done responses after buffers have been freed. A local user can trigger the race condition to cause a denial of service.
This issue is exposed by a race between buffer cleanup and asynchronous DSP response handling.
Affected software
Linux kernel
How to mitigate CVE-2026-72257
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
External References
- https://git.kernel.org/stable/c/214af790e3a33ab73587de4c925c60a550eae9c6
- https://git.kernel.org/stable/c/2c715f8a1e644ce4c3e8be5b0fd3f1f4704b73b3
- https://git.kernel.org/stable/c/2e9261761b35f0b67b7487688cd1365f535be0b3
- https://git.kernel.org/stable/c/a164e744d8de1c41049bd9a1452a4b6bbf5bd8bc
- https://git.kernel.org/stable/c/ca028334343a140efda4b22e53cbce2c5e94a489
- https://git.kernel.org/stable/c/ec369eac0795cfa8f4d3a0cd35a1e8e15f780331