SB20260812296 - Improper resource shutdown or release in Linux kernel gpu drm driver

Description

This security bulletin contains information about 1 vulnerability.

1) Improper resource shutdown or release (CVE-ID: CVE-2026-68240)

CWE-ID: CWE-404 - Improper Resource Shutdown or Release

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 denial of service.

The vulnerability exists due to improper state management in drm_gpusvm_get_pages() and the err_unmap cleanup path when handling device page mappings after a later page-mapping error. A local user can trigger a later mapping error after device mappings have already been created to cause a denial of service.

The issue occurs because previously created device mappings are not cleaned up if a later page mapping fails.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/72e4fca5529e45b5beebad79d804de442f632324
• https://git.kernel.org/stable/c/7f708f51e3955bda0d77a0b67ab9bea6c97fea99
• https://git.kernel.org/stable/c/e8362523fd1b61712f7d996802f9b5dee545c7e6