Answer in brief
CVE-2025-38718 records a High severity (CVSS 7.8) vulnerability in sctp: linearize cloned gso packets in sctp_rcv. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=90017accff61ae89283ad9a51f9ac46ca01633fb <d0194e391bb493aa6cec56d177b14df6b29188d5 || >=90017accff61ae89283ad9a51f9ac46ca01633fb <03d0cc6889e02420125510b5444b570f4bbf53d5 || >=90017accff61ae89283ad9a51f9ac46ca01633fb <cd0e92bb2b7542fb96397ffac639b4f5b099d0cb || >=90017accff61ae89283ad9a51f9ac46ca01633fb <4506bcaabe004d07be8ff09116a3024fbd6aa965 || >=90017accff61ae89283ad9a51f9ac46ca01633fb <ea094f38d387d1b0ded5dee4a3e5720aa4ce0139 || >=90017accff61ae89283ad9a51f9ac46ca01633fb <7d757f17bc2ef2727994ffa6d5d6e4bc4789a770 || >=90017accff61ae89283ad9a51f9ac46ca01633fb <fc66772607101bd2030a4332b3bd0ea3b3605250 || >=90017accff61ae89283ad9a51f9ac46ca01633fb <1bd5214ea681584c5886fea3ba03e49f93a43c0e || >=90017accff61ae89283ad9a51f9ac46ca01633fb <fd60d8a086191fe33c2d719732d2482052fa6805 | d0194e391bb493aa6cec56d177b14df6b29188d5, 03d0cc6889e02420125510b5444b570f4bbf53d5, cd0e92bb2b7542fb96397ffac639b4f5b099d0cb, 4506bcaabe004d07be8ff09116a3024fbd6aa965, ea094f38d387d1b0ded5dee4a3e5720aa4ce0139, 7d757f17bc2ef2727994ffa6d5d6e4bc4789a770, fc66772607101bd2030a4332b3bd0ea3b3605250, 1bd5214ea681584c5886fea3ba03e49f93a43c0e, fd60d8a086191fe33c2d719732d2482052fa6805 |
| Linux/Linuxgeneric | 4.8 | Not reported |
Published upstream
Sep 4, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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().
Quoted source text, attributed separately from HOL analysis.