CVE-2025-39812 (GCVE-0-2025-39812)
Vulnerability from cvelistv5
Published
2025-09-16 13:00
Modified
2025-11-03 17:43
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: sctp: initialize more fields in sctp_v6_from_sk() syzbot found that sin6_scope_id was not properly initialized, leading to undefined behavior. Clear sin6_scope_id and sin6_flowinfo. BUG: KMSAN: uninit-value in __sctp_v6_cmp_addr+0x887/0x8c0 net/sctp/ipv6.c:649 __sctp_v6_cmp_addr+0x887/0x8c0 net/sctp/ipv6.c:649 sctp_inet6_cmp_addr+0x4f2/0x510 net/sctp/ipv6.c:983 sctp_bind_addr_conflict+0x22a/0x3b0 net/sctp/bind_addr.c:390 sctp_get_port_local+0x21eb/0x2440 net/sctp/socket.c:8452 sctp_get_port net/sctp/socket.c:8523 [inline] sctp_listen_start net/sctp/socket.c:8567 [inline] sctp_inet_listen+0x710/0xfd0 net/sctp/socket.c:8636 __sys_listen_socket net/socket.c:1912 [inline] __sys_listen net/socket.c:1927 [inline] __do_sys_listen net/socket.c:1932 [inline] __se_sys_listen net/socket.c:1930 [inline] __x64_sys_listen+0x343/0x4c0 net/socket.c:1930 x64_sys_call+0x271d/0x3e20 arch/x86/include/generated/asm/syscalls_64.h:51 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd9/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Local variable addr.i.i created at: sctp_get_port net/sctp/socket.c:8515 [inline] sctp_listen_start net/sctp/socket.c:8567 [inline] sctp_inet_listen+0x650/0xfd0 net/sctp/socket.c:8636 __sys_listen_socket net/socket.c:1912 [inline] __sys_listen net/socket.c:1927 [inline] __do_sys_listen net/socket.c:1932 [inline] __se_sys_listen net/socket.c:1930 [inline] __x64_sys_listen+0x343/0x4c0 net/socket.c:1930
References
Impacted products
Vendor Product Version
Linux Linux Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
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      "descriptions": [
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          "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"
        }
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      "providerMetadata": {
        "dateUpdated": "2025-09-29T05:59:56.151Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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          "url": "https://git.kernel.org/stable/c/45e4b36593edffb7bbee5828ae820bc10a9fa0f3"
        },
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          "url": "https://git.kernel.org/stable/c/9546934c2054bba1bd605c44e936619159a34027"
        },
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          "url": "https://git.kernel.org/stable/c/17d6c7747045e9b802c2f5dfaba260d309d831ae"
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        {
          "url": "https://git.kernel.org/stable/c/2e8750469242cad8f01f320131fd5a6f540dbb99"
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      "title": "sctp: initialize more fields in sctp_v6_from_sk()",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-39812",
    "datePublished": "2025-09-16T13:00:14.103Z",
    "dateReserved": "2025-04-16T07:20:57.137Z",
    "dateUpdated": "2025-11-03T17:43:36.526Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-39812\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-09-16T13:15:54.537\",\"lastModified\":\"2025-11-03T18:16:48.263\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"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\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/17d6c7747045e9b802c2f5dfaba260d309d831ae\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/1bbc0c02aea1f1c405bd1271466889c25a1fe01b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/2e8750469242cad8f01f320131fd5a6f540dbb99\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/45e4b36593edffb7bbee5828ae820bc10a9fa0f3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/463aa96fca6209bb205f49f7deea3817d7ddaa3a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/65b4693d8bab5370cfcb44a275b4d8dcb06e56bf\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9546934c2054bba1bd605c44e936619159a34027\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f6c2cc99fc2387ba6499facd6108f6543382792d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}"
  }
}


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