CVE-2025-38718 (GCVE-0-2025-38718)
Vulnerability from cvelistv5
Published
2025-09-04 15:33
Modified
2025-09-04 15:33
Severity ?
VLAI Severity ?
EPSS score ?
Summary
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().
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| ▼ | Linux | Linux |
Version: 90017accff61ae89283ad9a51f9ac46ca01633fb Version: 90017accff61ae89283ad9a51f9ac46ca01633fb Version: 90017accff61ae89283ad9a51f9ac46ca01633fb Version: 90017accff61ae89283ad9a51f9ac46ca01633fb Version: 90017accff61ae89283ad9a51f9ac46ca01633fb Version: 90017accff61ae89283ad9a51f9ac46ca01633fb Version: 90017accff61ae89283ad9a51f9ac46ca01633fb Version: 90017accff61ae89283ad9a51f9ac46ca01633fb |
||||||
|
|||||||||
{
"containers": {
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{
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"programFiles": [
"net/sctp/input.c"
],
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"vendor": "Linux",
"versions": [
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},
{
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"version": "0",
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},
{
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"status": "unaffected",
"version": "5.4.297",
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},
{
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"status": "unaffected",
"version": "5.10.241",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "5.15.190",
"versionType": "semver"
},
{
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"version": "6.6.103",
"versionType": "semver"
},
{
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"version": "6.12.43",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "6.15.11",
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},
{
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"status": "unaffected",
"version": "6.16.2",
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},
{
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"status": "unaffected",
"version": "6.17-rc2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
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}
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}
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],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: linearize cloned gso packets in sctp_rcv\n\nA cloned head skb still shares these frag skbs in fraglist with the\noriginal head skb. It\u0027s not safe to access these frag skbs.\n\nsyzbot reported two use-of-uninitialized-memory bugs caused by this:\n\n BUG: KMSAN: uninit-value in sctp_inq_pop+0x15b7/0x1920 net/sctp/inqueue.c:211\n sctp_inq_pop+0x15b7/0x1920 net/sctp/inqueue.c:211\n sctp_assoc_bh_rcv+0x1a7/0xc50 net/sctp/associola.c:998\n sctp_inq_push+0x2ef/0x380 net/sctp/inqueue.c:88\n sctp_backlog_rcv+0x397/0xdb0 net/sctp/input.c:331\n sk_backlog_rcv+0x13b/0x420 include/net/sock.h:1122\n __release_sock+0x1da/0x330 net/core/sock.c:3106\n release_sock+0x6b/0x250 net/core/sock.c:3660\n sctp_wait_for_connect+0x487/0x820 net/sctp/socket.c:9360\n sctp_sendmsg_to_asoc+0x1ec1/0x1f00 net/sctp/socket.c:1885\n sctp_sendmsg+0x32b9/0x4a80 net/sctp/socket.c:2031\n inet_sendmsg+0x25a/0x280 net/ipv4/af_inet.c:851\n sock_sendmsg_nosec net/socket.c:718 [inline]\n\nand\n\n BUG: KMSAN: uninit-value in sctp_assoc_bh_rcv+0x34e/0xbc0 net/sctp/associola.c:987\n sctp_assoc_bh_rcv+0x34e/0xbc0 net/sctp/associola.c:987\n sctp_inq_push+0x2a3/0x350 net/sctp/inqueue.c:88\n sctp_backlog_rcv+0x3c7/0xda0 net/sctp/input.c:331\n sk_backlog_rcv+0x142/0x420 include/net/sock.h:1148\n __release_sock+0x1d3/0x330 net/core/sock.c:3213\n release_sock+0x6b/0x270 net/core/sock.c:3767\n sctp_wait_for_connect+0x458/0x820 net/sctp/socket.c:9367\n sctp_sendmsg_to_asoc+0x223a/0x2260 net/sctp/socket.c:1886\n sctp_sendmsg+0x3910/0x49f0 net/sctp/socket.c:2032\n inet_sendmsg+0x269/0x2a0 net/ipv4/af_inet.c:851\n sock_sendmsg_nosec net/socket.c:712 [inline]\n\nThis patch fixes it by linearizing cloned gso packets in sctp_rcv()."
}
],
"providerMetadata": {
"dateUpdated": "2025-09-04T15:33:12.448Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/d0194e391bb493aa6cec56d177b14df6b29188d5"
},
{
"url": "https://git.kernel.org/stable/c/03d0cc6889e02420125510b5444b570f4bbf53d5"
},
{
"url": "https://git.kernel.org/stable/c/cd0e92bb2b7542fb96397ffac639b4f5b099d0cb"
},
{
"url": "https://git.kernel.org/stable/c/ea094f38d387d1b0ded5dee4a3e5720aa4ce0139"
},
{
"url": "https://git.kernel.org/stable/c/7d757f17bc2ef2727994ffa6d5d6e4bc4789a770"
},
{
"url": "https://git.kernel.org/stable/c/fc66772607101bd2030a4332b3bd0ea3b3605250"
},
{
"url": "https://git.kernel.org/stable/c/1bd5214ea681584c5886fea3ba03e49f93a43c0e"
},
{
"url": "https://git.kernel.org/stable/c/fd60d8a086191fe33c2d719732d2482052fa6805"
}
],
"title": "sctp: linearize cloned gso packets in sctp_rcv",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2025-38718",
"datePublished": "2025-09-04T15:33:12.448Z",
"dateReserved": "2025-04-16T04:51:24.033Z",
"dateUpdated": "2025-09-04T15:33:12.448Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2025-38718\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-09-04T16:15:41.413\",\"lastModified\":\"2025-09-05T17:47:24.833\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nsctp: linearize cloned gso packets in sctp_rcv\\n\\nA cloned head skb still shares these frag skbs in fraglist with the\\noriginal head skb. It\u0027s not safe to access these frag skbs.\\n\\nsyzbot reported two use-of-uninitialized-memory bugs caused by this:\\n\\n BUG: KMSAN: uninit-value in sctp_inq_pop+0x15b7/0x1920 net/sctp/inqueue.c:211\\n sctp_inq_pop+0x15b7/0x1920 net/sctp/inqueue.c:211\\n sctp_assoc_bh_rcv+0x1a7/0xc50 net/sctp/associola.c:998\\n sctp_inq_push+0x2ef/0x380 net/sctp/inqueue.c:88\\n sctp_backlog_rcv+0x397/0xdb0 net/sctp/input.c:331\\n sk_backlog_rcv+0x13b/0x420 include/net/sock.h:1122\\n __release_sock+0x1da/0x330 net/core/sock.c:3106\\n release_sock+0x6b/0x250 net/core/sock.c:3660\\n sctp_wait_for_connect+0x487/0x820 net/sctp/socket.c:9360\\n sctp_sendmsg_to_asoc+0x1ec1/0x1f00 net/sctp/socket.c:1885\\n sctp_sendmsg+0x32b9/0x4a80 net/sctp/socket.c:2031\\n inet_sendmsg+0x25a/0x280 net/ipv4/af_inet.c:851\\n sock_sendmsg_nosec net/socket.c:718 [inline]\\n\\nand\\n\\n BUG: KMSAN: uninit-value in sctp_assoc_bh_rcv+0x34e/0xbc0 net/sctp/associola.c:987\\n sctp_assoc_bh_rcv+0x34e/0xbc0 net/sctp/associola.c:987\\n sctp_inq_push+0x2a3/0x350 net/sctp/inqueue.c:88\\n sctp_backlog_rcv+0x3c7/0xda0 net/sctp/input.c:331\\n sk_backlog_rcv+0x142/0x420 include/net/sock.h:1148\\n __release_sock+0x1d3/0x330 net/core/sock.c:3213\\n release_sock+0x6b/0x270 net/core/sock.c:3767\\n sctp_wait_for_connect+0x458/0x820 net/sctp/socket.c:9367\\n sctp_sendmsg_to_asoc+0x223a/0x2260 net/sctp/socket.c:1886\\n sctp_sendmsg+0x3910/0x49f0 net/sctp/socket.c:2032\\n inet_sendmsg+0x269/0x2a0 net/ipv4/af_inet.c:851\\n sock_sendmsg_nosec net/socket.c:712 [inline]\\n\\nThis patch fixes it by linearizing cloned gso packets in sctp_rcv().\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/03d0cc6889e02420125510b5444b570f4bbf53d5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/1bd5214ea681584c5886fea3ba03e49f93a43c0e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7d757f17bc2ef2727994ffa6d5d6e4bc4789a770\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cd0e92bb2b7542fb96397ffac639b4f5b099d0cb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d0194e391bb493aa6cec56d177b14df6b29188d5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ea094f38d387d1b0ded5dee4a3e5720aa4ce0139\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/fc66772607101bd2030a4332b3bd0ea3b3605250\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/fd60d8a086191fe33c2d719732d2482052fa6805\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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