CVE-2026-68240

kernel: drm/gpusvm: publish dpagemap early to avoid device mapping leak on error

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Severity

Low

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · August 10, 2026

Updated · October 30, 2026

Description

A flaw was found in the Linux kernel's drm/gpusvm component. When drm_gpusvm_get_pages() encounters an error during page mapping, it fails to properly unmap previously created device mappings. This oversight can lead to a device mapping leak, consuming system resources and potentially impacting system stability or performance over time.

Statement

This issue affects drm/gpusvm GPU shared virtual memory. On page mapping errors, device mappings created earlier were not unmapped because dpagemap was only stored on the success path. Systems without gpusvm are not affected.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-772 · Missing Release of Resource after Effective Lifetime