# CVE-2026-31468: linux: In the Linux kernel, the following vulnerability has been resolved:  vfio/pci: Fix double free in dma-buf feature  Th...

CVE-2026-31468 is fixed in linux on 1 platform by DEBIAN-CVE-2026-31468 (version 6.19.11-1), released May 15, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-31468
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0012
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 22, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:  vfio/pci: Fix double free in dma-buf feature  The error path through vfio_pci_core_feature_dma_buf() ignores its own advice to only use dma_buf_put() after dma_buf_export(), instead falling through the entire unwind chain.  In the unlikely event that we encounter file descriptor exhaustion, this can result in an unbalanced refcount on the vfio device and double free of allocated objects.  Avoid this by moving the "put" directly into the error path and return the errno rather than entering the unwind chain.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 6.19.11-1 | [DEBIAN-CVE-2026-31468](https://patchblox.com/security/data/fix/linux/debian-cve-2026-31468.md) | May 15, 2026 |

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Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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