{"api_version":"1","generated_at":"2026-08-13T13:38:47+00:00","cve":"CVE-2025-38718","urls":{"html":"https://cve.report/CVE-2025-38718","api":"https://cve.report/api/cve/CVE-2025-38718.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2025-38718","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2025-38718"},"summary":{"title":"sctp: linearize cloned gso packets in sctp_rcv","description":"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's 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().","state":"PUBLISHED","assigner":"Linux","published_at":"2025-09-04 16:15:41","updated_at":"2026-07-30 06:23:36"},"problem_types":["CWE-908"],"metrics":[{"version":"3.1","source":"nvd@nist.gov","type":"Primary","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"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"}},{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"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"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/7d757f17bc2ef2727994ffa6d5d6e4bc4789a770","name":"https://git.kernel.org/stable/c/7d757f17bc2ef2727994ffa6d5d6e4bc4789a770","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/fd60d8a086191fe33c2d719732d2482052fa6805","name":"https://git.kernel.org/stable/c/fd60d8a086191fe33c2d719732d2482052fa6805","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1bd5214ea681584c5886fea3ba03e49f93a43c0e","name":"https://git.kernel.org/stable/c/1bd5214ea681584c5886fea3ba03e49f93a43c0e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4506bcaabe004d07be8ff09116a3024fbd6aa965","name":"https://git.kernel.org/stable/c/4506bcaabe004d07be8ff09116a3024fbd6aa965","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/03d0cc6889e02420125510b5444b570f4bbf53d5","name":"https://git.kernel.org/stable/c/03d0cc6889e02420125510b5444b570f4bbf53d5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d0194e391bb493aa6cec56d177b14df6b29188d5","name":"https://git.kernel.org/stable/c/d0194e391bb493aa6cec56d177b14df6b29188d5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ea094f38d387d1b0ded5dee4a3e5720aa4ce0139","name":"https://git.kernel.org/stable/c/ea094f38d387d1b0ded5dee4a3e5720aa4ce0139","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/fc66772607101bd2030a4332b3bd0ea3b3605250","name":"https://git.kernel.org/stable/c/fc66772607101bd2030a4332b3bd0ea3b3605250","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/cd0e92bb2b7542fb96397ffac639b4f5b099d0cb","name":"https://git.kernel.org/stable/c/cd0e92bb2b7542fb96397ffac639b4f5b099d0cb","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html","name":"https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Mailing List","Third Party Advisory"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2025-38718","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-38718","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 90017accff61ae89283ad9a51f9ac46ca01633fb d0194e391bb493aa6cec56d177b14df6b29188d5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 90017accff61ae89283ad9a51f9ac46ca01633fb 03d0cc6889e02420125510b5444b570f4bbf53d5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 90017accff61ae89283ad9a51f9ac46ca01633fb cd0e92bb2b7542fb96397ffac639b4f5b099d0cb git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 90017accff61ae89283ad9a51f9ac46ca01633fb 4506bcaabe004d07be8ff09116a3024fbd6aa965 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 90017accff61ae89283ad9a51f9ac46ca01633fb ea094f38d387d1b0ded5dee4a3e5720aa4ce0139 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 90017accff61ae89283ad9a51f9ac46ca01633fb 7d757f17bc2ef2727994ffa6d5d6e4bc4789a770 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 90017accff61ae89283ad9a51f9ac46ca01633fb fc66772607101bd2030a4332b3bd0ea3b3605250 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 90017accff61ae89283ad9a51f9ac46ca01633fb 1bd5214ea681584c5886fea3ba03e49f93a43c0e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 90017accff61ae89283ad9a51f9ac46ca01633fb fd60d8a086191fe33c2d719732d2482052fa6805 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4.8","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.8 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.4.297 5.4.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.241 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.190 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.162 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.103 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.43 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.15.11 6.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.16.2 6.16.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.17 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2025","cve_id":"38718","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"linux","cpe5":"linux_kernel","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"providerMetadata":{"dateUpdated":"2025-11-03T17:41:48.713Z","orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE"},"references":[{"url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"}],"title":"CVE Program Container"},{"metrics":[{"other":{"content":{"id":"CVE-2025-38718","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","timestamp":"2026-06-10T20:40:36.204042Z","version":"2.0.3"},"type":"ssvc"}}],"providerMetadata":{"dateUpdated":"2026-06-11T18:44:03.458Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/sctp/input.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"d0194e391bb493aa6cec56d177b14df6b29188d5","status":"affected","version":"90017accff61ae89283ad9a51f9ac46ca01633fb","versionType":"git"},{"lessThan":"03d0cc6889e02420125510b5444b570f4bbf53d5","status":"affected","version":"90017accff61ae89283ad9a51f9ac46ca01633fb","versionType":"git"},{"lessThan":"cd0e92bb2b7542fb96397ffac639b4f5b099d0cb","status":"affected","version":"90017accff61ae89283ad9a51f9ac46ca01633fb","versionType":"git"},{"lessThan":"4506bcaabe004d07be8ff09116a3024fbd6aa965","status":"affected","version":"90017accff61ae89283ad9a51f9ac46ca01633fb","versionType":"git"},{"lessThan":"ea094f38d387d1b0ded5dee4a3e5720aa4ce0139","status":"affected","version":"90017accff61ae89283ad9a51f9ac46ca01633fb","versionType":"git"},{"lessThan":"7d757f17bc2ef2727994ffa6d5d6e4bc4789a770","status":"affected","version":"90017accff61ae89283ad9a51f9ac46ca01633fb","versionType":"git"},{"lessThan":"fc66772607101bd2030a4332b3bd0ea3b3605250","status":"affected","version":"90017accff61ae89283ad9a51f9ac46ca01633fb","versionType":"git"},{"lessThan":"1bd5214ea681584c5886fea3ba03e49f93a43c0e","status":"affected","version":"90017accff61ae89283ad9a51f9ac46ca01633fb","versionType":"git"},{"lessThan":"fd60d8a086191fe33c2d719732d2482052fa6805","status":"affected","version":"90017accff61ae89283ad9a51f9ac46ca01633fb","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/sctp/input.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.8"},{"lessThan":"4.8","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.4.*","status":"unaffected","version":"5.4.297","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.241","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.190","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.162","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.103","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.43","versionType":"semver"},{"lessThanOrEqual":"6.15.*","status":"unaffected","version":"6.15.11","versionType":"semver"},{"lessThanOrEqual":"6.16.*","status":"unaffected","version":"6.16.2","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"6.17","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.4.297","versionStartIncluding":"4.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.241","versionStartIncluding":"4.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.190","versionStartIncluding":"4.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.162","versionStartIncluding":"4.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.103","versionStartIncluding":"4.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.43","versionStartIncluding":"4.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.15.11","versionStartIncluding":"4.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.16.2","versionStartIncluding":"4.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.17","versionStartIncluding":"4.8","vulnerable":true}],"negate":false,"operator":"OR"}]}],"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's 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":[{"cvssV3_1":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"providerMetadata":{"dateUpdated":"2026-07-30T05:56:38.464Z","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/4506bcaabe004d07be8ff09116a3024fbd6aa965"},{"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":"2026-07-30T05:56:38.464Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2025-09-04 16:15:41","lastModifiedDate":"2026-07-30 06:23:36","problem_types":["CWE-908"],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","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},{"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}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-06-10T20:40:36.204042Z","id":"CVE-2025-38718","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"total"}],"role":"CISA 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linearize cloned gso packets in sctp_rcv","CVE":"CVE-2025-38718","Year":"2025"},"notes":[{"CveYear":"2025","CveId":"38718","Ordinal":"1","NoteData":"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's 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().","Type":"Description","Title":"sctp: linearize cloned gso packets in sctp_rcv"}]}}}