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.
Product status
90017accff61ae89283ad9a51f9ac46ca01633fb (git) before 61cda2777b07d27459f5cac5a047c3edf9c8a1a9
90017accff61ae89283ad9a51f9ac46ca01633fb (git) before 08165c296597075763130919f2aae59b5822f016
90017accff61ae89283ad9a51f9ac46ca01633fb (git) before 03e80a4b04ef1fb2c61dd63216ab8d3a5dcb196f
90017accff61ae89283ad9a51f9ac46ca01633fb (git) before 4f6da435fb5d8a21cbf8cae5ca5a2ba0e1012b71
90017accff61ae89283ad9a51f9ac46ca01633fb (git) before cb9055ba30306ede4ad920002233d0659982f1cb
90017accff61ae89283ad9a51f9ac46ca01633fb (git) before 7a832b0f99be19df608cb75c023f8027b1789bd1
90017accff61ae89283ad9a51f9ac46ca01633fb (git) before 89b465b54227c245ddc7cc9ed822231af21123ef
90017accff61ae89283ad9a51f9ac46ca01633fb (git) before 441f0647f7673e0e64d4910ef61a5fb8f16bfb82
4.8
Any version before 4.8
5.4.301 (semver)
5.10.246 (semver)
5.15.196 (semver)
6.1.158 (semver)
6.6.115 (semver)
6.12.56 (semver)
6.17.6 (semver)
6.18 (original_commit_for_fix)
References
git.kernel.org/...c/61cda2777b07d27459f5cac5a047c3edf9c8a1a9
git.kernel.org/...c/08165c296597075763130919f2aae59b5822f016
git.kernel.org/...c/03e80a4b04ef1fb2c61dd63216ab8d3a5dcb196f
git.kernel.org/...c/4f6da435fb5d8a21cbf8cae5ca5a2ba0e1012b71
git.kernel.org/...c/cb9055ba30306ede4ad920002233d0659982f1cb
git.kernel.org/...c/7a832b0f99be19df608cb75c023f8027b1789bd1
git.kernel.org/...c/89b465b54227c245ddc7cc9ed822231af21123ef
git.kernel.org/...c/441f0647f7673e0e64d4910ef61a5fb8f16bfb82
