How severe is CVE-2025-21972?

This vulnerability has a severity rating of NONE with a CVSS score of N/A out of 10.

What type of vulnerability is CVE-2025-21972?

This is classified as NVD-CWE-Other, which is a common weakness in software security.

CVE-2025-21972 - NONE Severity | CVSS N/A

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: net: mctp: unshare packets when reassembling Ensure that the frag_list used for reassembly isn't shared with other packets. This avoids incorrect reassembly when packets are cloned, and prevents a memory leak due to circular references between fragments and their skb_shared_info. The upcoming MCTP-over-USB driver uses skb_clone which can trigger the problem - other MCTP drivers don't share SKBs. A kunit test is added to reproduce the issue.

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