CyberRota Analysis
This is a high severity vulnerability with a CVSS score of 8.8. It affects Linux.
CVE
CVE-2025-21972
Severity
HIGH
CVSS
8.8
EPSS
0.25%
Linux
Original NVD 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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