SB20261007185 - Use-after-free in Linux kernel drm msm driver

Description

This security bulletin contains information about 1 vulnerability.

1) Use-after-free (CVE-ID: CVE-2026-98180)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a local user to read freed kernel memory.

The vulnerability exists due to use-after-free in the DRM MSM driver's embedded GPU schedulers when retrieving a fence timeline name after the containing ringbuffer or virtual memory object has been freed. A local user can query a finished, exported fence through SYNC_IOC_FILE_INFO to read freed kernel memory.

The affected fences include submit out-fences and VM_BIND fences exported to userspace through sync_file or drm_syncobj.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/01c8d1f385f788f1bbbbb7687c4386d614281218
• https://git.kernel.org/stable/c/713abac5c04ccbae67f9ac68c3921845535388e7
• https://git.kernel.org/stable/c/d81bf4581903b0cba0698cd4d1c07fc6be21754a