# CVE-2026-68423: linux: In the Linux kernel, the following vulnerability has been resolved:  mtd: virt_concat: fix use-after-free in mtd_virt...

CVE-2026-68423 is fixed in linux on 1 platform by DEBIAN-CVE-2026-68423 (version 7.1.6-1), released August 11, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-68423
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0020
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 10, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:  mtd: virt_concat: fix use-after-free in mtd_virt_concat_destroy()  mtd_concat_destroy() frees item->concat so calling mtd_virt_concat_put_mtd_devices(item->concat) after that leads to a use-after-free.  Fix it by moving mtd_virt_concat_put_mtd_devices() before mtd_concat_destroy().

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 7.1.6-1 | [DEBIAN-CVE-2026-68423](https://patchblox.com/security/data/fix/linux/debian-cve-2026-68423.md) | Aug 11, 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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