What’s Vulnerable › Vulnerabilities

CVE-2026-53322: vfio/pci: Clean up DMABUFs before disabling function

• 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: 2026-06-26 · updated 2026-09-09
• Weakness: CWE-415

Description

In the Linux kernel, the following vulnerability has been resolved: vfio/pci: Clean up DMABUFs before disabling function On device shutdown, make vfio_pci_core_close_device() call vfio_pci_dma_buf_cleanup() before the function is disabled via vfio_pci_core_disable(). This ensures that all access via DMABUFs is revoked before the function's BARs become inaccessible. This fixes an issue where, if the function is disabled first, a tiny window exists in which the function's MSE is cleared and yet BARs could still be accessed via the DMABUF. The resources would also be freed and up for grabs by a different driver.

Affected products

• Linux kernel: from 6.19 before 7.0.10 — fixed in 7.0.10

How to fix

Upgrade to a fixed version: Linux kernel 7.0.10. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/4f1000a30f67cf7d328059242776a858611d5ef9
• https://git.kernel.org/stable/c/d97708701434ce72968e771976aaf9d3438fcafd
• https://access.redhat.com/errata/RHSA-2026:65334
• https://access.redhat.com/security/cve/CVE-2026-53322
• https://bugzilla.redhat.com/show_bug.cgi?id=2493709
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53322.json

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