Use-after-free in Linux kernel - CVE-2026-64008
Published: July 20, 2026
Vulnerability identifier: #VU138638
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: CVE-2026-64008
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a use-after-free in rocket_ioctl_create_bo() and subsequent GEM handle lookups when processing ioctl requests with a dangling GEM handle. A local user can trigger create_bo failure conditions and then reuse the stale handle in later ioctls to cause a denial of service.
Exploitation requires access to the affected device interface and use of a freed handle through PREP_BO, FINI_BO, or SUBMIT operations.
How to mitigate CVE-2026-64008
Install security update from vendor's repository.