CVE-2026-53322vfio/pci: Clean up DMABUFs before disabling function
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No exploitation reported and no EPSS estimate yet.
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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
- 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- Weakness (CWE)
- CWE-826
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Sep 9, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 5d74781ebc86c5fa9e9d6934024c505412de9b52 builds before 4f1000a30f67cf7d328059242776a858611d5ef9; from 5d74781ebc86c5fa9e9d6934024c505412de9b52 before d97708701434ce72968e771976aaf9d3438fcafd | CNA record |
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux | from 0:6.12.0-211.53.1.el10_2 not affected | CISA ADP |
linux linux_kernel linux:linux_kernel | from 6.19 before 7.0.10 | NVD |
References
- https://git.kernel.org/stable/c/4f1000a30f67cf7d328059242776a858611d5ef9patch
- https://git.kernel.org/stable/c/d97708701434ce72968e771976aaf9d3438fcafdpatch
- https://access.redhat.com/errata/RHSA-2026:65334
- https://access.redhat.com/security/cve/CVE-2026-53322third-party-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2493709third-party-advisory
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53322.jsonthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.