CVE-2025-21972
- Source
- https://cve.org/CVERecord?id=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
BELL (1)
DEBIAN (1)
ECHO (1)
MINI (1)
OESA (2)
ROOT (3)
SUSE (10)
- Related
- Published
- 2025-04-01T15:47:04Z
- Modified
- 2026-10-22T02:49:04Z
- Severity
-
- 8.8 (High) CVSS_V3 - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- net: mctp: unshare packets when reassembling
- Details
-
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.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21972.json" }- References
-
- https://git.kernel.org/stable/c/3d0281d0713952e8dd14d6d47e3a9c345c28a3b7
- https://git.kernel.org/stable/c/5c47d5bfa7b096cf8890afac32141c578583f8e0
- https://git.kernel.org/stable/c/f44fff3d3c6cd67b6f348b821d73c4d6888c7a6e
- https://git.kernel.org/stable/c/f5d83cf0eeb90fade4d5c4d17d24b8bee9ceeecc
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21972.json
- https://nvd.nist.gov/vuln/detail/CVE-2025-21972
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced4a992bbd365094730a31bae1e12a6ca695336d57Fixed3d0281d0713952e8dd14d6d47e3a9c345c28a3b7Fixed5c47d5bfa7b096cf8890afac32141c578583f8e0Fixedf44fff3d3c6cd67b6f348b821d73c4d6888c7a6eFixedf5d83cf0eeb90fade4d5c4d17d24b8bee9ceeecc