What’s Vulnerable › Vulnerabilities

CVE-2026-64042: vfio/pci: Check BAR resources before exporting a DMABUF

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-19 · updated 2026-10-05
• Weakness: CWE-862

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 products

• Linux kernel: from 6.19 before 7.0.11; 7.1-rc1, 7.1-rc2, 7.1-rc3 — fixed in 7.0.11

How to fix

Upgrade to a fixed version: Linux kernel 7.0.11. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/702809dabdecca807bdd50cfdcc1c980feb2ba62
• https://git.kernel.org/stable/c/8443cd4497a4498c4b01058d76a92116244cb605

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