# CVE-2025-68221: linux: In the Linux kernel, the following vulnerability has been resolved:  mptcp: fix address removal logic in mptcp_pm_nl_...

CVE-2025-68221 is fixed in linux on 1 platform by DEBIAN-CVE-2025-68221 (version 6.17.10-1), released December 16, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2025-68221
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0021
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 16, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  mptcp: fix address removal logic in mptcp_pm_nl_rm_addr  Fix inverted WARN_ON_ONCE condition that prevented normal address removal counter updates. The current code only executes decrement logic when the counter is already 0 (abnormal state), while normal removals (counter > 0) are ignored.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 6.17.10-1 | [DEBIAN-CVE-2025-68221](https://patchblox.com/security/data/fix/linux/debian-cve-2025-68221.md) | Dec 16, 2025 |

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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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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