SB20260625110 - Improper locking in Linux kernel drm msm driver

Description

This security bulletin contains information about 1 vulnerability.

1) Improper locking (CVE-ID: CVE-2026-53054)

CWE-ID: CWE-667 - Improper Locking

CVSSv4: 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

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper locking in drm/msm vm_bind unmap handling when processing VM_BIND UNMAP operations for non-_NO_SHARE buffer objects. A local user can trigger a VM_BIND UNMAP operation to cause a denial of service.

The issue only manifests with non-_NO_SHARE buffer objects, because _NO_SHARE objects share a common reservation object with the VM that is always locked.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/206f812ef140727b75697111391ae320fd8aa652
• https://git.kernel.org/stable/c/85042c2cd970a6b0e686329387096fe19989ae62
• https://git.kernel.org/stable/c/d9ecf758270501b2e7a0bc1dd69a6f28f1ae3cae