{"api_version":"1","generated_at":"2026-06-04T23:01:09+00:00","cve":"CVE-2025-39812","urls":{"html":"https://cve.report/CVE-2025-39812","api":"https://cve.report/api/cve/CVE-2025-39812.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2025-39812","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2025-39812"},"summary":{"title":"sctp: initialize more fields in sctp_v6_from_sk()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: initialize more fields in sctp_v6_from_sk()\n\nsyzbot found that sin6_scope_id was not properly initialized,\nleading to undefined behavior.\n\nClear sin6_scope_id and sin6_flowinfo.\n\nBUG: KMSAN: uninit-value in __sctp_v6_cmp_addr+0x887/0x8c0 net/sctp/ipv6.c:649\n  __sctp_v6_cmp_addr+0x887/0x8c0 net/sctp/ipv6.c:649\n  sctp_inet6_cmp_addr+0x4f2/0x510 net/sctp/ipv6.c:983\n  sctp_bind_addr_conflict+0x22a/0x3b0 net/sctp/bind_addr.c:390\n  sctp_get_port_local+0x21eb/0x2440 net/sctp/socket.c:8452\n  sctp_get_port net/sctp/socket.c:8523 [inline]\n  sctp_listen_start net/sctp/socket.c:8567 [inline]\n  sctp_inet_listen+0x710/0xfd0 net/sctp/socket.c:8636\n  __sys_listen_socket net/socket.c:1912 [inline]\n  __sys_listen net/socket.c:1927 [inline]\n  __do_sys_listen net/socket.c:1932 [inline]\n  __se_sys_listen net/socket.c:1930 [inline]\n  __x64_sys_listen+0x343/0x4c0 net/socket.c:1930\n  x64_sys_call+0x271d/0x3e20 arch/x86/include/generated/asm/syscalls_64.h:51\n  do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n  do_syscall_64+0xd9/0x210 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nLocal variable addr.i.i created at:\n  sctp_get_port net/sctp/socket.c:8515 [inline]\n  sctp_listen_start net/sctp/socket.c:8567 [inline]\n  sctp_inet_listen+0x650/0xfd0 net/sctp/socket.c:8636\n  __sys_listen_socket net/socket.c:1912 [inline]\n  __sys_listen net/socket.c:1927 [inline]\n  __do_sys_listen net/socket.c:1932 [inline]\n  __se_sys_listen net/socket.c:1930 [inline]\n  __x64_sys_listen+0x343/0x4c0 net/socket.c:1930","state":"PUBLISHED","assigner":"Linux","published_at":"2025-09-16 13:15:54","updated_at":"2026-05-12 13:17:12"},"problem_types":["CWE-908"],"metrics":[{"version":"3.1","source":"nvd@nist.gov","type":"Primary","score":"5.5","severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":5.5,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"}}],"references":[{"url":"https://git.kernel.org/stable/c/463aa96fca6209bb205f49f7deea3817d7ddaa3a","name":"https://git.kernel.org/stable/c/463aa96fca6209bb205f49f7deea3817d7ddaa3a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html","name":"https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third 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semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.4.298 5.4.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.242 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.191 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.150 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.104 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.45 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.16.5 6.16.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.17 * original_commit_for_fix","platforms":[]},{"source":"ADP","vendor":"Siemens","product":"SIMATIC CN 4100","version":"affected V5.0 custom","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2025","cve_id":"39812","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":"2025-11-03T17:43:36.526Z","orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE"},"references":[{"url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"},{"url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"}],"title":"CVE Program Container"},{"affected":[{"defaultStatus":"unknown","product":"SIMATIC CN 4100","vendor":"Siemens","versions":[{"lessThan":"V5.0","status":"affected","version":"0","versionType":"custom"}]}],"providerMetadata":{"dateUpdated":"2026-05-12T12:07:13.590Z","orgId":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e","shortName":"siemens-SADP"},"references":[{"url":"https://cert-portal.siemens.com/productcert/html/ssa-032379.html"}],"x_adpType":"supplier"}],"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/sctp/ipv6.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"45e4b36593edffb7bbee5828ae820bc10a9fa0f3","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"9546934c2054bba1bd605c44e936619159a34027","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"17d6c7747045e9b802c2f5dfaba260d309d831ae","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"65b4693d8bab5370cfcb44a275b4d8dcb06e56bf","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"463aa96fca6209bb205f49f7deea3817d7ddaa3a","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"1bbc0c02aea1f1c405bd1271466889c25a1fe01b","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"f6c2cc99fc2387ba6499facd6108f6543382792d","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"2e8750469242cad8f01f320131fd5a6f540dbb99","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/sctp/ipv6.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.12"},{"lessThan":"2.6.12","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.4.*","status":"unaffected","version":"5.4.298","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.242","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.191","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.150","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.104","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.45","versionType":"semver"},{"lessThanOrEqual":"6.16.*","status":"unaffected","version":"6.16.5","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":"5.4.298","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.242","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.191","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.150","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.104","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.45","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.16.5","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.17","versionStartIncluding":"2.6.12","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: initialize more fields in sctp_v6_from_sk()\n\nsyzbot found that sin6_scope_id was not properly initialized,\nleading to undefined behavior.\n\nClear sin6_scope_id and sin6_flowinfo.\n\nBUG: KMSAN: uninit-value in __sctp_v6_cmp_addr+0x887/0x8c0 net/sctp/ipv6.c:649\n  __sctp_v6_cmp_addr+0x887/0x8c0 net/sctp/ipv6.c:649\n  sctp_inet6_cmp_addr+0x4f2/0x510 net/sctp/ipv6.c:983\n  sctp_bind_addr_conflict+0x22a/0x3b0 net/sctp/bind_addr.c:390\n  sctp_get_port_local+0x21eb/0x2440 net/sctp/socket.c:8452\n  sctp_get_port net/sctp/socket.c:8523 [inline]\n  sctp_listen_start net/sctp/socket.c:8567 [inline]\n  sctp_inet_listen+0x710/0xfd0 net/sctp/socket.c:8636\n  __sys_listen_socket net/socket.c:1912 [inline]\n  __sys_listen net/socket.c:1927 [inline]\n  __do_sys_listen net/socket.c:1932 [inline]\n  __se_sys_listen net/socket.c:1930 [inline]\n  __x64_sys_listen+0x343/0x4c0 net/socket.c:1930\n  x64_sys_call+0x271d/0x3e20 arch/x86/include/generated/asm/syscalls_64.h:51\n  do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n  do_syscall_64+0xd9/0x210 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nLocal variable addr.i.i created at:\n  sctp_get_port net/sctp/socket.c:8515 [inline]\n  sctp_listen_start net/sctp/socket.c:8567 [inline]\n  sctp_inet_listen+0x650/0xfd0 net/sctp/socket.c:8636\n  __sys_listen_socket net/socket.c:1912 [inline]\n  __sys_listen net/socket.c:1927 [inline]\n  __do_sys_listen net/socket.c:1932 [inline]\n  __se_sys_listen net/socket.c:1930 [inline]\n  __x64_sys_listen+0x343/0x4c0 net/socket.c:1930"}],"providerMetadata":{"dateUpdated":"2026-05-11T21:36:49.762Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/45e4b36593edffb7bbee5828ae820bc10a9fa0f3"},{"url":"https://git.kernel.org/stable/c/9546934c2054bba1bd605c44e936619159a34027"},{"url":"https://git.kernel.org/stable/c/17d6c7747045e9b802c2f5dfaba260d309d831ae"},{"url":"https://git.kernel.org/stable/c/65b4693d8bab5370cfcb44a275b4d8dcb06e56bf"},{"url":"https://git.kernel.org/stable/c/463aa96fca6209bb205f49f7deea3817d7ddaa3a"},{"url":"https://git.kernel.org/stable/c/1bbc0c02aea1f1c405bd1271466889c25a1fe01b"},{"url":"https://git.kernel.org/stable/c/f6c2cc99fc2387ba6499facd6108f6543382792d"},{"url":"https://git.kernel.org/stable/c/2e8750469242cad8f01f320131fd5a6f540dbb99"}],"title":"sctp: initialize more fields in sctp_v6_from_sk()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2025-39812","datePublished":"2025-09-16T13:00:14.103Z","dateReserved":"2025-04-16T07:20:57.137Z","dateUpdated":"2026-05-12T12:07:13.590Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2025-09-16 13:15:54","lastModifiedDate":"2026-05-12 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initialize more fields in sctp_v6_from_sk()","CVE":"CVE-2025-39812","Year":"2025"},"notes":[{"CveYear":"2025","CveId":"39812","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: initialize more fields in sctp_v6_from_sk()\n\nsyzbot found that sin6_scope_id was not properly initialized,\nleading to undefined behavior.\n\nClear sin6_scope_id and sin6_flowinfo.\n\nBUG: KMSAN: uninit-value in __sctp_v6_cmp_addr+0x887/0x8c0 net/sctp/ipv6.c:649\n  __sctp_v6_cmp_addr+0x887/0x8c0 net/sctp/ipv6.c:649\n  sctp_inet6_cmp_addr+0x4f2/0x510 net/sctp/ipv6.c:983\n  sctp_bind_addr_conflict+0x22a/0x3b0 net/sctp/bind_addr.c:390\n  sctp_get_port_local+0x21eb/0x2440 net/sctp/socket.c:8452\n  sctp_get_port net/sctp/socket.c:8523 [inline]\n  sctp_listen_start net/sctp/socket.c:8567 [inline]\n  sctp_inet_listen+0x710/0xfd0 net/sctp/socket.c:8636\n  __sys_listen_socket net/socket.c:1912 [inline]\n  __sys_listen net/socket.c:1927 [inline]\n  __do_sys_listen net/socket.c:1932 [inline]\n  __se_sys_listen net/socket.c:1930 [inline]\n  __x64_sys_listen+0x343/0x4c0 net/socket.c:1930\n  x64_sys_call+0x271d/0x3e20 arch/x86/include/generated/asm/syscalls_64.h:51\n  do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n  do_syscall_64+0xd9/0x210 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nLocal variable addr.i.i created at:\n  sctp_get_port net/sctp/socket.c:8515 [inline]\n  sctp_listen_start net/sctp/socket.c:8567 [inline]\n  sctp_inet_listen+0x650/0xfd0 net/sctp/socket.c:8636\n  __sys_listen_socket net/socket.c:1912 [inline]\n  __sys_listen net/socket.c:1927 [inline]\n  __do_sys_listen net/socket.c:1932 [inline]\n  __se_sys_listen net/socket.c:1930 [inline]\n  __x64_sys_listen+0x343/0x4c0 net/socket.c:1930","Type":"Description","Title":"sctp: initialize more fields in sctp_v6_from_sk()"}]}}}