CVE-2025-21972
net: mctp: unshare packets when reassembling
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Apr 1, 2025 |
| Last Updated | May 11, 2026 |
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Affected Versions
Linux / Linux
4a992bbd365094730a31bae1e12a6ca695336d57 < 5c47d5bfa7b096cf8890afac32141c578583f8e0 4a992bbd365094730a31bae1e12a6ca695336d57 < f44fff3d3c6cd67b6f348b821d73c4d6888c7a6e 4a992bbd365094730a31bae1e12a6ca695336d57 < f5d83cf0eeb90fade4d5c4d17d24b8bee9ceeecc
Linux / Linux
5.15