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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.13%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.13% probability · 3th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/8c795012d0e06b7740e40319b86ff8d2a435098dPatch
- https://git.kernel.org/stable/c/8dd6edbe26770df147136c3f2ac976c873b82650Patch
- https://git.kernel.org/stable/c/97a8e89cdef36207a8776edc03d6931763a06ad0Patch
- https://git.kernel.org/stable/c/9baafc2fea096279e75480f93fd5942e8336b510Patch
- https://git.kernel.org/stable/c/aa16b2bc0f02709919e2435f531406531e5bcc69Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.