# CVE-2025-71272: most: core: fix resource leak in most_register_interface error paths

CVE-2025-71272 is fixed in linux on 1 platform, first by DEBIAN-CVE-2025-71272, released May 15, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2025-71272
- Priority: Routine
- CVSS: 5.5 (Moderate)
- EPSS: 0.0016
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 6, 2026
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-71272

## Description

In the Linux kernel, the following vulnerability has been resolved:  most: core: fix resource leak in most_register_interface error paths  The function most_register_interface() did not correctly release resources if it failed early (before registering the device). In these cases, it returned an error code immediately, leaking the memory allocated for the interface.  Fix this by initializing the device early via device_initialize() and calling put_device() on all error paths.  The most_register_interface() is expected to call put_device() on error which frees the resources allocated in the caller. The put_device() either calls release_mdev() or dim2_release(), depending on the caller.  Switch to using device_add() instead of device_register() to handle the split initialization.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.12.85-1 | [DEBIAN-CVE-2025-71272](https://patchblox.com/security/data/fix/linux/debian-cve-2025-71272.md) | May 15, 2026 |
| Linux | linux Debian 14 | 6.19.6-1 | [DEBIAN-CVE-2025-71272](https://patchblox.com/security/data/fix/linux/debian-cve-2025-71272.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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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