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Vulnerability record · CVE-2026-53322 · published 26 June 2026

CVE-2026-53322: Linux kernel double free vulnerability

Linux · Linux Kernel

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.

8.8 CVSS 3.1 High EPSS 0.36% · top 72.5% CWE-415 · Double freeCWE-826 · CWE-826
8.8CVSS 3.1 base score
0.36%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
9 Sep 2026Last modified by NVD

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.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Source: NIST National Vulnerability Database (record CVE-2026-53322), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.