Review reviewHigh

CVE-2026-64051

Linux

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]

CVSS: 7.8
EPSS: -
CISA KEV: Not listed
Published: 2026.07.20

PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability-

Technical severityCVSS 7.8

Vulnerability overview

Affected product and versions

Product: Linux
Affected versions: >= ff13be8303336ead5621712f2c55012d738878b5 < 9baafc2fea096279e75480f93fd5942e8336b510, >= ff13be8303336ead5621712f2c55012d738878b5 < 8dd6edbe26770df147136c3f2ac976c873b82650, >= ff13be8303336ead5621712f2c55012d738878b5 < 97a8e89cdef36207a8776edc03d6931763a06ad0, >= ff13be8303336ead5621712f2c55012d738878b5 < 8c795012d0e06b7740e40319b86ff8d2a435098d, >= ff13be8303336ead5621712f2c55012d738878b5 < aa16b2bc0f02709919e2435f531406531e5bcc69, >= 6.4
Fixed versions: No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

1
Identify
Confirm that Linux and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE: Not available