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Vulnerability record · CVE-2026-64051 · published 19 July 2026

CVE-2026-64051: Linux kernel use after free vulnerability

Linux · Linux Kernel

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]

7.8 CVSS 3.1 High EPSS 0.18% · top 93.7% CWE-416 · Use after free
7.8CVSS 3.1 base score
0.18%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
5References
2 Sep 2026Last modified by NVD

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]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/8c795012d0e06b7740e40319b86ff8d2a435098d Patch
https://git.kernel.org/stable/c/8dd6edbe26770df147136c3f2ac976c873b82650 Patch
https://git.kernel.org/stable/c/97a8e89cdef36207a8776edc03d6931763a06ad0 Patch
https://git.kernel.org/stable/c/9baafc2fea096279e75480f93fd5942e8336b510 Patch
https://git.kernel.org/stable/c/aa16b2bc0f02709919e2435f531406531e5bcc69 Patch

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Source: NIST National Vulnerability Database (record CVE-2026-64051), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.