SB20260720225 - Use-after-free in Linux kernel accel rocket driver

Description

This security bulletin contains information about 1 vulnerability.

1) Use-after-free (CVE-ID: CVE-2026-64008)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 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]

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.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/18abd88d19ea195e2e1547fca0970c2f91d77a42
• https://git.kernel.org/stable/c/451f1ccbbdb7b65021646704b15902655f8d228a
• https://git.kernel.org/stable/c/f706e6a4ce75585af979aec3dcbdce68bc76306b