CVE-2026-64051

accel/qaic: Add overflow check to remap_pfn_range during mmap

State: Published
Severity: 7.8 High
Published: Jul 19, 2026
Updated: Aug 5, 2026
Reserved: Jul 19, 2026

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]

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	ff13be8303336ead5621712f2c55012d738878b5 to before 9baafc2fea096279e75480f93fd5942e8336b510Affected ff13be8303336ead5621712f2c55012d738878b5 to before 8dd6edbe26770df147136c3f2ac976c873b82650Affected ff13be8303336ead5621712f2c55012d738878b5 to before 97a8e89cdef36207a8776edc03d6931763a06ad0Affected ff13be8303336ead5621712f2c55012d738878b5 to before 8c795012d0e06b7740e40319b86ff8d2a435098dAffected ff13be8303336ead5621712f2c55012d738878b5 to before aa16b2bc0f02709919e2435f531406531e5bcc69Affected
LinuxLinux	6.4Affected before 6.4Not affected 6.6.142 through 6.6.Not affected 6.12.92 through 6.12.Not affected 6.18.34 through 6.18.Not affected 7.0.11 through 7.0.Not affected 7.1 and laterNot affected

Product

Versions

LinuxLinux

ff13be8303336ead5621712f2c55012d738878b5 to before 9baafc2fea096279e75480f93fd5942e8336b510Affected
ff13be8303336ead5621712f2c55012d738878b5 to before 8dd6edbe26770df147136c3f2ac976c873b82650Affected
ff13be8303336ead5621712f2c55012d738878b5 to before 97a8e89cdef36207a8776edc03d6931763a06ad0Affected
ff13be8303336ead5621712f2c55012d738878b5 to before 8c795012d0e06b7740e40319b86ff8d2a435098dAffected
ff13be8303336ead5621712f2c55012d738878b5 to before aa16b2bc0f02709919e2435f531406531e5bcc69Affected

LinuxLinux

6.4Affected
before 6.4Not affected
6.6.142 through 6.6.*Not affected
6.12.92 through 6.12.*Not affected
6.18.34 through 6.18.*Not affected
7.0.11 through 7.0.*Not affected
7.1 and laterNot affected

References

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