SB2026102287 - Use-after-free in Linux kernel drm nouveau driver

Description

This security bulletin contains information about 1 vulnerability.

1) Use-after-free (CVE-ID: CVE-2026-98512)

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 potentially cause a denial of service by triggering a read of freed kernel memory.

The vulnerability exists due to use-after-free in the Linux kernel nouveau scheduler when retrieving timeline information for a finished fence after its scheduler has been destroyed. A local user can query an exported fence through SYNC_IOC_FILE_INFO to trigger drm_sched_fence_get_timeline_name() to dereference freed scheduler memory, potentially causing a kernel crash.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/35151e9a8274174ccbb92e3b3ba7dc7a008dcada
• https://git.kernel.org/stable/c/40edf5eefc3fd94592a91d6eb074d4fc6f606c75
• https://git.kernel.org/stable/c/cd6e11b6ebe04a0a1f1435df561acada9eadc563
• https://git.kernel.org/stable/c/f7eae6d8d768fabd6b59779ca7da79e02c74e113