Answer in brief
CVE-2025-38718 records a Unknown severity 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.
Answer in brief
CVE-2025-38718 records a Unknown severity 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.
A CVSS score is not reported in the current record. 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.
| 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
Aug 5, 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.
A CVSS score is not reported in the current record. 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.
| 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
Aug 5, 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.