SB20261023201 - Missing Synchronization in Linux kernel gpu drm driver

Description

This security bulletin contains information about 1 vulnerability.

1) Missing Synchronization (CVE-ID: CVE-2026-98973)

CWE-ID: CWE-820 - Missing Synchronization

CVSSv4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local user to trigger kernel list corruption that may cause a denial of service.

The vulnerability exists due to missing synchronization in the Linux kernel drm_bridge_add() function when re-adding a previously removed bridge while other operations access the shared bridge lists. A local user can trigger overlapping bridge lifecycle operations to corrupt bridge_list or bridge_lingering_list, potentially causing a denial of service.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/b62e3db8cdc1680e1c3390591e872f485148541a
• https://git.kernel.org/stable/c/f469d850854101eae60dd4080244f114a9bcf2b5