NULL pointer dereference in Linux kernel - CVE-2026-64489
Published: July 27, 2026
Vulnerability identifier: #VU139450
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-2026-64489
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 snd_ymfpci_create_spdif_controls() when handling control creation after memory allocation failure in snd_ctl_new1(). A local user can trigger memory allocation failure and reach the dereference of a NULL control pointer to cause a denial of service.
Affected software
Linux kernel
How to mitigate CVE-2026-64489
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
External References
- https://git.kernel.org/stable/c/02f33c2062c75e28abc7ad58ce86451cf3140455
- https://git.kernel.org/stable/c/18ec7d7785be7a4ee8ea11e355122282caad4267
- https://git.kernel.org/stable/c/91095474eea29b95c9a8bceb9b501a2702b6c55f
- https://git.kernel.org/stable/c/d7c71dfd4b80f0eacac2c157a8a3a4c6e8b2e0d1
- https://git.kernel.org/stable/c/e64d170346d00b580c0043de3e5ccb3e331c47d4
- https://git.kernel.org/stable/c/f6538a318947b627710b08a268bc80a48c23bde7