drm/shmem_helper: Check VMA boundaries for PMD mappings (CVE-2026-80582) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-80582

drm/shmem_helper: Check VMA boundaries for PMD mappings

Answer in brief

CVE-2026-80582 records a Unknown severity vulnerability in drm/shmem_helper: Check VMA boundaries for PMD mappings. 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 26, 2026Updated Aug 26, 2026Source checked Aug 26, 2026First seen by HOL Aug 26, 2026Material review Aug 26, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. 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	>=fc3bbf34e643faa8678aabdc3810c60109f3435a <12803e89a1e593fd1e784dfe7453f5e392ccaff2 \|\| >=fc3bbf34e643faa8678aabdc3810c60109f3435a <617bbd08714857c1613d7c550d43a9092ec0fb97	12803e89a1e593fd1e784dfe7453f5e392ccaff2, 617bbd08714857c1613d7c550d43a9092ec0fb97
Linux/Linuxgeneric	7.0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 12803e89a1e593fd1e784dfe7453f5e392ccaff2 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 26, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 26, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 26, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: drm/shmem_helper: Check VMA boundaries for PMD mappings In the ->huge_fault handler do not install a PMD huge page mapping if the huge page exceeds the boundaries of the VMA. All other ->huge_fault handlers have similar checks and the resulting mapping will trigger a VM_BUG_ON_VMA() if it ever reaches copy_pmd_range().

Quoted source text, attributed separately from HOL analysis.