SB2026102283 - NULL pointer dereference in Linux kernel drm virtio driver

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Main Vulnerability Database SB2026102283

SB2026102283 - NULL pointer dereference in Linux kernel drm virtio driver

Published: October 22, 2026

Security Bulletin ID SB2026102283
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) NULL pointer dereference (CVE-ID: CVE-2026-98508)

CWE-ID: CWE-476 - NULL Pointer Dereference

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 by triggering a kernel fault.

The vulnerability exists due to a null pointer dereference in the Linux kernel virtio GPU driver's submission handling when fence allocation fails under memory pressure. A local user can submit GPU work through the driver's ioctl interface to trigger a path where virtio_gpu_init_submit() passes an unchecked NULL allocation result to virtio_gpu_fence_event_create(), causing a kernel fault and a denial of service.


Remediation

Install update from vendor's website.

References