CVEvulnerability
CVE-2025-40240
7.5 HIGH
Official page ↗
- Status
- Deferred
- Published
- 2025-12-04
- Last modified
- 2026-10-19
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- CVSS 3.1 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Description
In the Linux kernel, the following vulnerability has been resolved:
sctp: avoid NULL dereference when chunk data buffer is missing
chunk->skb pointer is dereferenced in the if-block where it's supposed
to be NULL only.
chunk->skb can only be NULL if chunk->head_skb is not. Check for frag_list
instead and do it just before replacing chunk->skb. We're sure that
otherwise chunk->skb is non-NULL because of outer if() condition.
References
- https://git.kernel.org/stable/c/03e80a4b04ef1fb2c61dd63216ab8d3a5dcb196f git.kernel.org
- https://git.kernel.org/stable/c/08165c296597075763130919f2aae59b5822f016 git.kernel.org
- https://git.kernel.org/stable/c/441f0647f7673e0e64d4910ef61a5fb8f16bfb82 git.kernel.org
- https://git.kernel.org/stable/c/4f6da435fb5d8a21cbf8cae5ca5a2ba0e1012b71 git.kernel.org
- https://git.kernel.org/stable/c/61cda2777b07d27459f5cac5a047c3edf9c8a1a9 git.kernel.org
- https://git.kernel.org/stable/c/7a832b0f99be19df608cb75c023f8027b1789bd1 git.kernel.org
- https://git.kernel.org/stable/c/89b465b54227c245ddc7cc9ed822231af21123ef git.kernel.org
- https://git.kernel.org/stable/c/cb9055ba30306ede4ad920002233d0659982f1cb git.kernel.org