SB20261023163 - Improper control of a resource through its lifetime in Linux kernel drm xe driver

Description

This security bulletin contains information about 1 vulnerability.

1) Improper control of a resource through its lifetime (CVE-ID: CVE-2026-99000)

CWE-ID: CWE-664 - Improper control of a resource through its lifetime

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

The vulnerability allows a local user to cause a persistent memory-reclamation accounting leak that may degrade system availability.

The vulnerability exists due to improper resource lifecycle accounting in the Linux kernel Xe driver's framebuffer pin and unpin paths when a framebuffer unpin releases the final pin on a buffer object also handled by another pinning path. A local user can trigger overlapping buffer-object pin lifecycles ending in a framebuffer unpin to leave a stale pinned_link entry and a permanent shrinker accounting leak, potentially degrading system availability.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/83d5acca1f4f6132038ea88c72c5844f62e42d44
• https://git.kernel.org/stable/c/993c952e6832ad0aa4be82e11f0760b1f532090a
• https://git.kernel.org/stable/c/ab39bc55cf08208b8511b1c09926b1b646a8befc