CVE-2025-38718 (GCVE-0-2025-38718)

Vulnerability from cvelistv5 – Published: 2025-09-04 15:33 – Updated: 2025-11-03 17:41
VLAI?
Title
sctp: linearize cloned gso packets in sctp_rcv
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().
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 90017accff61ae89283ad9a51f9ac46ca01633fb , < d0194e391bb493aa6cec56d177b14df6b29188d5 (git)
Affected: 90017accff61ae89283ad9a51f9ac46ca01633fb , < 03d0cc6889e02420125510b5444b570f4bbf53d5 (git)
Affected: 90017accff61ae89283ad9a51f9ac46ca01633fb , < cd0e92bb2b7542fb96397ffac639b4f5b099d0cb (git)
Affected: 90017accff61ae89283ad9a51f9ac46ca01633fb , < ea094f38d387d1b0ded5dee4a3e5720aa4ce0139 (git)
Affected: 90017accff61ae89283ad9a51f9ac46ca01633fb , < 7d757f17bc2ef2727994ffa6d5d6e4bc4789a770 (git)
Affected: 90017accff61ae89283ad9a51f9ac46ca01633fb , < fc66772607101bd2030a4332b3bd0ea3b3605250 (git)
Affected: 90017accff61ae89283ad9a51f9ac46ca01633fb , < 1bd5214ea681584c5886fea3ba03e49f93a43c0e (git)
Affected: 90017accff61ae89283ad9a51f9ac46ca01633fb , < fd60d8a086191fe33c2d719732d2482052fa6805 (git)
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    Linux Linux Affected: 4.8
Unaffected: 0 , < 4.8 (semver)
Unaffected: 5.4.297 , ≤ 5.4.* (semver)
Unaffected: 5.10.241 , ≤ 5.10.* (semver)
Unaffected: 5.15.190 , ≤ 5.15.* (semver)
Unaffected: 6.6.103 , ≤ 6.6.* (semver)
Unaffected: 6.12.43 , ≤ 6.12.* (semver)
Unaffected: 6.15.11 , ≤ 6.15.* (semver)
Unaffected: 6.16.2 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)
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          "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()."
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    "cveId": "CVE-2025-38718",
    "datePublished": "2025-09-04T15:33:12.448Z",
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    "dateUpdated": "2025-11-03T17:41:48.713Z",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2025-38718\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-09-04T16:15:41.413\",\"lastModified\":\"2026-01-09T16:06:35.750\",\"vulnStatus\":\"Analyzed\",\"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\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-908\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.8\",\"versionEndExcluding\":\"5.4.297\",\"matchCriteriaId\":\"D3E65573-3126-4085-8D6E-6D924A36E2BA\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.241\",\"matchCriteriaId\":\"D0D21C35-EB8A-488A-BBF9-403E4817E5DD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.190\",\"matchCriteriaId\":\"AD9E597F-3DDE-4D7E-976C-463D0611F13F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.6.103\",\"matchCriteriaId\":\"A82156DA-8CE7-4F72-B394-6452BD927498\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.43\",\"matchCriteriaId\":\"472C5F87-2BF3-4FAB-9B21-DA7513977363\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.15.11\",\"matchCriteriaId\":\"BC242347-F722-43AE-B910-BE0B22386977\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.16\",\"versionEndExcluding\":\"6.16.2\",\"matchCriteriaId\":\"BD7C087D-2415-4521-B624-30003352F899\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"327D22EF-390B-454C-BD31-2ED23C998A1C\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"FA6FEEC2-9F11-4643-8827-749718254FED\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/03d0cc6889e02420125510b5444b570f4bbf53d5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/1bd5214ea681584c5886fea3ba03e49f93a43c0e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/7d757f17bc2ef2727994ffa6d5d6e4bc4789a770\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/cd0e92bb2b7542fb96397ffac639b4f5b099d0cb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d0194e391bb493aa6cec56d177b14df6b29188d5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ea094f38d387d1b0ded5dee4a3e5720aa4ce0139\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/fc66772607101bd2030a4332b3bd0ea3b3605250\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/fd60d8a086191fe33c2d719732d2482052fa6805\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\",\"Mailing List\"]}]}}"
  }
}


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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.