SB20260918164 - Improper initialization in Linux kernel drm msm driver

Description

This security bulletin contains information about 1 vulnerability.

1) Improper initialization (CVE-ID: CVE-2026-93058)

CWE-ID: CWE-665 - Improper Initialization

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 improper initialization handling in msm_ringbuffer_new() and msm_ringbuffer_destroy() when scheduler initialization fails before completion. A local user can initiate ring-buffer creation that encounters a scheduler initialization failure, causing cleanup to invoke scheduler teardown on a partially initialized scheduler to cause a denial of service.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/09b360eb6ce345996a30fad8c86e9df80f41cd7e
• https://git.kernel.org/stable/c/d43e1bbfd43458b9242806eec77ea3b032134baf
• https://git.kernel.org/stable/c/e2332abed2a4d3caa59052095dc16e4ce44791ea