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CVE-2026-64042

vfio/pci: Check BAR resources before exporting a DMABUF

HIGH
8.8
CVSS Score
Published: July 19, 2026 at 03:39 PM UTC
Updated: October 5, 2026 at 06:22 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH8.8
Exploit prediction
EPSS 0.1%

Description

In the Linux kernel, the following vulnerability has been resolved: vfio/pci: Check BAR resources before exporting a DMABUF A DMABUF exports access to BAR resources and, although they are requested at startup time, we need to ensure they really were reserved before exporting. Otherwise, it's possible to access unreserved resources through the export. Add a check to the DMABUF-creation path.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
95%
6.19 ≤ v < 7.0.116.19 ≤ v < 7.15d74781ebc86c5fa9e9d6934024c505412de9b526.197.1 rc17.1 rc27.1 rc3
Vendor states this is fixed in 702809dabdecca807bdd50cfdcc1c980feb2ba62 (fixed)
Vendor states this is fixed in 8443cd4497a4498c4b01058d76a92116244cb605 (fixed)
Vendor states this is fixed in 6.19 (unaffected)
Vendor states this is fixed in 7.0.11 (unaffected)
Vendor states this is fixed in 7.1 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Patch
Source: cverecord
https://git.kernel.org/stable/c/8443cd4497a4498c4b01058d76a92116244cb605
Patch
Source: cverecord
https://git.kernel.org/stable/c/702809dabdecca807bdd50cfdcc1c980feb2ba62

CVSS

8.8HIGHLinux
Vector?

Quick Info

StatusANALYZED
CWE
CWE-862

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