Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: sctp: linearize cloned gso packets in sctp_rcv A cloned head skb still shares these frag skbs in fraglist with the original head skb. It's not safe to access these frag skbs. syzbot reported two use-of-uninitialized-memory bugs caused by this: BUG: KMSAN: uninit-value in sctp_inq_pop+0x15b7/0x1920 net/sctp/inqueue.c:211 sctp_inq_pop+0x15b7/0x1920 net/sctp/inqueue.c:211 sctp_assoc_bh_rcv+0x1a7/0xc50 net/sctp/associola.c:998 sctp_inq_push+0x2ef/0x380 net/sctp/inqueue.c:88 sctp_backlog_rcv+0x397/0xdb0 net/sctp/input.c:331 sk_backlog_rcv+0x13b/0x420 include/net/sock.h:1122 __release_sock+0x1da/0x330 net/core/sock.c:3106 release_sock+0x6b/0x250 net/core/sock.c:3660 sctp_wait_for_connect+0x487/0x820 net/sctp/socket.c:9360 sctp_sendmsg_to_asoc+0x1ec1/0x1f00 net/sctp/socket.c:1885 sctp_sendmsg+0x32b9/0x4a80 net/sctp/socket.c:2031 inet_sendmsg+0x25a/0x280 net/ipv4/af_inet.c:851 sock_sendmsg_nosec net/socket.c:718 [inline] and BUG: KMSAN: uninit-value in sctp_assoc_bh_rcv+0x34e/0xbc0 net/sctp/associola.c:987 sctp_assoc_bh_rcv+0x34e/0xbc0 net/sctp/associola.c:987 sctp_inq_push+0x2a3/0x350 net/sctp/inqueue.c:88 sctp_backlog_rcv+0x3c7/0xda0 net/sctp/input.c:331 sk_backlog_rcv+0x142/0x420 include/net/sock.h:1148 __release_sock+0x1d3/0x330 net/core/sock.c:3213 release_sock+0x6b/0x270 net/core/sock.c:3767 sctp_wait_for_connect+0x458/0x820 net/sctp/socket.c:9367 sctp_sendmsg_to_asoc+0x223a/0x2260 net/sctp/socket.c:1886 sctp_sendmsg+0x3910/0x49f0 net/sctp/socket.c:2032 inet_sendmsg+0x269/0x2a0 net/ipv4/af_inet.c:851 sock_sendmsg_nosec net/socket.c:712 [inline] This patch fixes it by linearizing cloned gso packets in sctp_rcv().
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 90017accff61ae89283ad9a51f9ac46ca01633fb before d0194e391bb493aa6cec56d177b14df6b29188d5; affected 90017accff61ae89283ad9a51f9ac46ca01633fb before 03d0cc6889e02420125510b5444b570f4bbf53d5; affected 90017accff61ae89283ad9a51f9ac46ca01633fb before cd0e92bb2b7542fb96397ffac639b4f5b099d0cb; affected 90017accff61ae89283ad9a51f9ac46ca01633fb before 4506bcaabe004d07be8ff09116a3024fbd6aa965; affected 90017accff61ae89283ad9a51f9ac46ca01633fb before ea094f38d387d1b0ded5dee4a3e5720aa4ce0139; affected 90017accff61ae89283ad9a51f9ac46ca01633fb before 7d757f17bc2ef2727994ffa6d5d6e4bc4789a770; affected 90017accff61ae89283ad9a51f9ac46ca01633fb before fc66772607101bd2030a4332b3bd0ea3b3605250; affected 90017accff61ae89283ad9a51f9ac46ca01633fb before 1bd5214ea681584c5886fea3ba03e49f93a43c0e; affected 90017accff61ae89283ad9a51f9ac46ca01633fb before fd60d8a086191fe33c2d719732d2482052fa6805 |
| Linux / Linux | affected 4.8; unaffected 0 before 4.8; unaffected 5.4.297 through 5.4.*; unaffected 5.10.241 through 5.10.*; unaffected 5.15.190 through 5.15.*; unaffected 6.1.162 through 6.1.*; unaffected 6.6.103 through 6.6.*; unaffected 6.12.43 through 6.12.*; unaffected 6.15.11 through 6.15.*; unaffected 6.16.2 through 6.16.*; unaffected 6.17 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/d0194e391bb493aa6cec56d177b14df6b29188d5
- https://git.kernel.org/stable/c/03d0cc6889e02420125510b5444b570f4bbf53d5
- https://git.kernel.org/stable/c/cd0e92bb2b7542fb96397ffac639b4f5b099d0cb
- https://git.kernel.org/stable/c/4506bcaabe004d07be8ff09116a3024fbd6aa965
- https://git.kernel.org/stable/c/ea094f38d387d1b0ded5dee4a3e5720aa4ce0139
- https://git.kernel.org/stable/c/7d757f17bc2ef2727994ffa6d5d6e4bc4789a770
- https://git.kernel.org/stable/c/fc66772607101bd2030a4332b3bd0ea3b3605250
- https://git.kernel.org/stable/c/1bd5214ea681584c5886fea3ba03e49f93a43c0e
- https://git.kernel.org/stable/c/fd60d8a086191fe33c2d719732d2482052fa6805
ADP enrichment
No English description supplied.
No English description supplied.
No references supplied.