CVE-2025-21972
MEDIUM
MEDIUM
Priority: 0.02
BB Relevance:
36/100
Published: 2025-04-01
Modified: 2026-10-30
First seen: 2026-10-30
Status: active
Attack Surface
Low Complexity
No Interaction
CVSS Vector Breakdown
AV:
Local
AC:
Low
PR:
Low
UI:
None
S:
Unchanged
C:
None
I:
None
A:
High
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.
Weakness Classification (1)
Affected Software (13)
| Vendor | Product | Version |
|---|---|---|
| Linux | Linux | 4a992bbd365094730a31bae1e12a6ca695336d57 < 771087069a27c35c0a9fd7cc74fe7725b189b96b |
| Linux | Linux | 4a992bbd365094730a31bae1e12a6ca695336d57 < 3d0281d0713952e8dd14d6d47e3a9c345c28a3b7 |
| Linux | Linux | 4a992bbd365094730a31bae1e12a6ca695336d57 < 5c47d5bfa7b096cf8890afac32141c578583f8e0 |
| Linux | Linux | 4a992bbd365094730a31bae1e12a6ca695336d57 < f44fff3d3c6cd67b6f348b821d73c4d6888c7a6e |
| Linux | Linux | 4a992bbd365094730a31bae1e12a6ca695336d57 < f5d83cf0eeb90fade4d5c4d17d24b8bee9ceeecc |
| Linux | Linux | 5.15 |
| linux | linux_kernel | 5.15 – 6.12.20 |
| linux | linux_kernel | 6.14 |
| linux | linux_kernel | 6.14 |
| linux | linux_kernel | 6.14 |
| linux | linux_kernel | 6.14 |
| linux | linux_kernel | 6.14 |
| linux | linux_kernel | 6.14 |