drm/gpusvm: publish dpagemap early to avoid device mapping leak on error (CVE-2026-68240) | HOL Guard CVE

High · CVSS 8.8CVE-2026-68240

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

Answer in brief

CVE-2026-68240 records a High severity (CVSS 8.8) vulnerability in drm/gpusvm: publish dpagemap early to avoid device mapping leak on error. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 10, 2026Updated Aug 17, 2026Source checked Sep 24, 2026First seen by HOL Aug 10, 2026Material review Aug 17, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 8.8
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 8.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=f70da6f99d4f40c5f481c92e3b65d5e36eaa6dc9 <e8362523fd1b61712f7d996802f9b5dee545c7e6 \|\| >=f70da6f99d4f40c5f481c92e3b65d5e36eaa6dc9 <72e4fca5529e45b5beebad79d804de442f632324 \|\| >=f70da6f99d4f40c5f481c92e3b65d5e36eaa6dc9 <7f708f51e3955bda0d77a0b67ab9bea6c97fea99	e8362523fd1b61712f7d996802f9b5dee545c7e6, 72e4fca5529e45b5beebad79d804de442f632324, 7f708f51e3955bda0d77a0b67ab9bea6c97fea99
Linux/Linuxgeneric	6.18	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to e8362523fd1b61712f7d996802f9b5dee545c7e6 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 10, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 10, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: drm/gpusvm: publish dpagemap early to avoid device mapping leak on error drm_gpusvm_get_pages() only stored the local dpagemap into svm_pages->dpagemap on the success path. If a later page failed (e.g. -EOPNOTSUPP when ctx->allow_mixed is false) and jumped to err_unmap, svm_pages->dpagemap was still NULL, so __drm_gpusvm_unmap_pages() skipped device_unmap() and leaked the device mappings already created. Assign svm_pages->dpagemap when the first device page is mapped so the err_unmap path can device_unmap() those mappings. This issue was found by Sashiko AI review.

Quoted source text, attributed separately from HOL analysis.