accel/qaic: Add overflow check to remap_pfn_range during mmap (CVE-2026-64051) | HOL Guard CVE

High · CVSS 7.8CVE-2026-64051

accel/qaic: Add overflow check to remap_pfn_range during mmap

Answer in brief

CVE-2026-64051 records a High severity (CVSS 7.8) vulnerability in accel/qaic: Add overflow check to remap_pfn_range during mmap. 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 Jul 19, 2026Updated Sep 2, 2026Source checked Sep 20, 2026First seen by HOL Aug 5, 2026Material review Sep 2, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.8
Exploitation: Not marked as known exploited
Affected software: 6 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 7.8. 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.

Affected products and reported versions
Product	Affected versions	Fixed versions
cpe:2.3:o:linux:linux_kernel::::::::	Not reported	Not reported
cpe:2.3:o:linux:linux_kernel:7.1:rc1::::::	Not reported	Not reported
cpe:2.3:o:linux:linux_kernel:7.1:rc2::::::	Not reported	Not reported
cpe:2.3:o:linux:linux_kernel:7.1:rc3::::::	Not reported	Not reported

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=ff13be8303336ead5621712f2c55012d738878b5 <9baafc2fea096279e75480f93fd5942e8336b510 \|\| >=ff13be8303336ead5621712f2c55012d738878b5 <8dd6edbe26770df147136c3f2ac976c873b82650 \|\| >=ff13be8303336ead5621712f2c55012d738878b5 <97a8e89cdef36207a8776edc03d6931763a06ad0 \|\| >=ff13be8303336ead5621712f2c55012d738878b5 <8c795012d0e06b7740e40319b86ff8d2a435098d \|\| >=ff13be8303336ead5621712f2c55012d738878b5 <aa16b2bc0f02709919e2435f531406531e5bcc69	9baafc2fea096279e75480f93fd5942e8336b510, 8dd6edbe26770df147136c3f2ac976c873b82650, 97a8e89cdef36207a8776edc03d6931763a06ad0, 8c795012d0e06b7740e40319b86ff8d2a435098d, aa16b2bc0f02709919e2435f531406531e5bcc69
Linux/Linuxgeneric	6.4	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 9baafc2fea096279e75480f93fd5942e8336b510 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Jul 19, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 2, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 5, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: accel/qaic: Add overflow check to remap_pfn_range during mmap The call to remap_pfn_range in qaic_gem_object_mmap is susceptible to (re)mapping beyond the VMA if the BO is too large. This can cause use after free issues when munmap() unmaps only the VMA region and not the additional mappings. To prevent this, check the remaining size of the VMA before remapping and truncate the remapped length if sg->length is too large. [jhugo: fix braces from checkpatch --strict]

Quoted source text, attributed separately from HOL analysis.