Improper input validation in Linux kernel - CVE-2026-80701
Published: August 28, 2026
Vulnerability identifier: #VU146100
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-2026-80701
CWE-ID: CWE-20
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 improper input validation in vmw_cursor_plane_atomic_check() and the vmwgfx cursor update path when handling DRM_IOCTL_MODE_CURSOR2 requests with oversized cursor dimensions. A local user can send a specially crafted ioctl request to cause a denial of service.
Exploitation is reachable by a DRM master, and the crash occurs when a NULL backing MOB is later dereferenced in the MOB cursor update path.
Affected software
Linux kernel
How to mitigate CVE-2026-80701
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3