SB2026081522 - Improper input validation in Linux kernel gpu drm driver

Description

This security bulletin contains information about 1 vulnerability.

1) Improper input validation (CVE-ID: CVE-2026-74420)

CWE-ID: CWE-20 - Improper input validation

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.

The vulnerability exists due to improper input validation in drm_gpusvm range creation in drivers/gpu/drm/drm_gpusvm.c when handling VMAs marked with VM_IO or VM_PFNMAP. A local user can trigger creation of an SVM range for such a VMA to cause a denial of service.

The issue can lead to repeated get_pages() failures and an infinite loop inside a driver's page-fault handler.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/353f26c74660bcbd8d82cd76622748e14a5a5db3
• https://git.kernel.org/stable/c/63f443384979563f16f70420f4fa85bba31238ca
• https://git.kernel.org/stable/c/b82a225e57a334335a21462b75ee2223bc6efe6d