SB2026102285 - NULL pointer dereference in Linux kernel drm xe driver

Description

This security bulletin contains information about 1 vulnerability.

1) NULL pointer dereference (CVE-ID: CVE-2026-98510)

CWE-ID: CWE-476 - NULL Pointer Dereference

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 cause a denial of service by triggering a kernel crash.

The vulnerability exists due to a null pointer dereference in the Linux kernel Xe graphics driver's virtual memory management when virtual machine teardown races with shared buffer object eviction in fault mode. A local user can trigger concurrent teardown and eviction operations to cause xe_pt_zap_ptes() to access an already-cleared page table root while external buffer object mappings remain linked, resulting in a kernel crash.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/24a22fb3c731474b68e986af6804db450fb88617
• https://git.kernel.org/stable/c/70fddc065ac80845ffd33095b3635d59883cf7e6
• https://git.kernel.org/stable/c/ba678c2b02e0d36b53deb5a6d5e5ea044d36def7
• https://git.kernel.org/stable/c/bddaa5e4094c134452c29e20a26c4718827e4cb1