Use After Free in Linux
CVE-2026-64051
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]
Vulnerability class: Use-After-Free
EPSS: 0.001 (2.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Linux — versions ff13be8303336ead5621712f2c55012d738878b5, 6.4, 0
- Linux Linux_kernel — versions 7.1
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-64051?
- CVE-2026-64051 is a high-severity vulnerability in Linux, classified under Use After Free. CVSS score: 7.8/10. Published 2026-07-19.
- How severe is CVE-2026-64051?
- High severity. CVSS v3 base score is 7.8 out of 10.