# CVE-2026-31650: linux: In the Linux kernel, the following vulnerability has been resolved:  mmc: vub300: fix use-after-free on disconnect  T...

CVE-2026-31650 is fixed in linux on 1 platform by DEBIAN-CVE-2026-31650 (version 6.19.13-1), released May 15, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-31650
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0015
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 24, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:  mmc: vub300: fix use-after-free on disconnect  The vub300 driver maintains an explicit reference count for the controller and its driver data and the last reference can in theory be dropped after the driver has been unbound.  This specifically means that the controller allocation must not be device managed as that can lead to use-after-free.  Note that the lifetime is currently also incorrectly tied the parent USB device rather than interface, which can lead to memory leaks if the driver is unbound without its device being physically disconnected (e.g. on probe deferral).  Fix both issues by reverting to non-managed allocation of the controller.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 6.19.13-1 | [DEBIAN-CVE-2026-31650](https://patchblox.com/security/data/fix/linux/debian-cve-2026-31650.md) | May 15, 2026 |

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Data as of 2026-11-09T07:25:28Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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