CVE-2025-21972
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2025-21972
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-21972.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2025-21972
- Downstream
- Related
- Published
- 2025-04-01T16:15:28Z
- Modified
- 2025-08-09T19:01:28Z
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
net: mctp: unshare packets when reassembling
Ensure that the fraglist 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 skbshared_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.
- References