CVE-2025-38718
published 2025-09-04CVE-2025-38718: 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…
high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
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
39 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | debian_linux | — | — |
| debian | linux | < linux 6.1.162-1 (bookworm) | linux 6.1.162-1 (bookworm) |
| debian | linux-6.1 | < linux 6.1.162-1 (bookworm) | linux 6.1.162-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | >= 90017accff61ae89283ad9a51f9ac46ca01633fb < d0194e391bb493aa6cec56d177b14df6b29188d5 | d0194e391bb493aa6cec56d177b14df6b29188d5 |
| linux | linux | >= 90017accff61ae89283ad9a51f9ac46ca01633fb < 03d0cc6889e02420125510b5444b570f4bbf53d5 | 03d0cc6889e02420125510b5444b570f4bbf53d5 |
| linux | linux | >= 90017accff61ae89283ad9a51f9ac46ca01633fb < cd0e92bb2b7542fb96397ffac639b4f5b099d0cb | cd0e92bb2b7542fb96397ffac639b4f5b099d0cb |
| linux | linux | >= 90017accff61ae89283ad9a51f9ac46ca01633fb < 4506bcaabe004d07be8ff09116a3024fbd6aa965 | 4506bcaabe004d07be8ff09116a3024fbd6aa965 |
| linux | linux | >= 90017accff61ae89283ad9a51f9ac46ca01633fb < ea094f38d387d1b0ded5dee4a3e5720aa4ce0139 | ea094f38d387d1b0ded5dee4a3e5720aa4ce0139 |
| linux | linux | >= 90017accff61ae89283ad9a51f9ac46ca01633fb < 7d757f17bc2ef2727994ffa6d5d6e4bc4789a770 | 7d757f17bc2ef2727994ffa6d5d6e4bc4789a770 |
| linux | linux | >= 90017accff61ae89283ad9a51f9ac46ca01633fb < fc66772607101bd2030a4332b3bd0ea3b3605250 | fc66772607101bd2030a4332b3bd0ea3b3605250 |
| linux | linux | >= 90017accff61ae89283ad9a51f9ac46ca01633fb < 1bd5214ea681584c5886fea3ba03e49f93a43c0e | 1bd5214ea681584c5886fea3ba03e49f93a43c0e |
| linux | linux | >= 90017accff61ae89283ad9a51f9ac46ca01633fb < fd60d8a086191fe33c2d719732d2482052fa6805 | fd60d8a086191fe33c2d719732d2482052fa6805 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 5.10.244-1 | 5.10.244-1 |
| linux | linux_kernel | >= 0 < 6.1.162-1 | 6.1.162-1 |
| linux | linux_kernel | >= 0 < 6.12.43-1 | 6.12.43-1 |
| linux | linux_kernel | >= 0 < 6.16.3-1 | 6.16.3-1 |
| linux | linux_kernel | >= 0 < 5.15.0-163.173 | 5.15.0-163.173 |
| linux | linux_kernel | >= 0 < 6.8.0-100.100 | 6.8.0-100.100 |
| linux | linux_kernel | >= 4.8 < 5.4.297 | 5.4.297 |
| linux | linux_kernel | >= 5.11 < 5.15.190 | 5.15.190 |
| linux | linux_kernel | >= 5.16 < 6.6.103 | 6.6.103 |
| linux | linux_kernel | >= 5.5 < 5.10.241 | 5.10.241 |
| linux | linux_kernel | >= 6.13 < 6.15.11 | 6.15.11 |
CVSS provenance
nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
osv7.8HIGH