calipso: Don't call calipso functions for AF_INET sk.

{
  "id": "c735225237e322b5198f6d1dbfa85e627c17ca1efdc96f98637daf7d3f08fd76",
  "url": "https://osv.dev/vulnerability/CVE-2025-38147",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "calipso: Don't call calipso functions for AF_INET sk.",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: calipso: Don't call calipso functions for AF_INET sk. syzkaller reported a null-ptr-deref in txopt_get(). [0] The offset 0x70 was of struct ipv6_txoptions in struct ipv6_pinfo, so struct ipv6_pinfo was NULL there. However, this never happens for IPv6 sockets as inet_sk(sk)->pinet6 is always set in inet6_create(), meaning the socket was not IPv6 one. The root cause is missing validation in netlbl_conn_setattr(). netlbl_conn_setattr() switches branches based on struct sockaddr.sa_family, which is passed from userspace. However, netlbl_conn_setattr() does not check if the address family matches the socket. The syzkaller must have called connect() for an IPv6 address on an IPv4 socket. We have a proper validation in tcp_v[46]_connect(), but security_socket_connect() is called in the earlier stage. Let's copy the validation to netlbl_conn_setattr(). [0]: Oops: general protection fault, probably for non-canonical address 0xdffffc000000000e: 0000 [#1] PREEMPT SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000070-0x0000000000000077] CPU: 2 UID: 0 PID: 12928 Comm: syz.9.1677 Not tainted 6.12.0 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014 RIP: 0010:txopt_get include/net/ipv6.h:390 [inline] RIP: 0010: Code: 02 00 00 49 8b ac 24 f8 02 00 00 e8 84 69 2a fd e8 ff 00 16 fd 48 8d 7d 70 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 53 02 00 00 48 8b 6",
    "evidence": "osv:CVE-2025-38147",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.4.295",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.10.239",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.186",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.142",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.94",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.34",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.15.3",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2025-38147",
      "aliases": [
        "CVE-2025-38147"
      ],
      "affected": [
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                  "fixed": "fc2da88411470480b8b7e9177e930cedd893cf56"
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                {
                  "fixed": "0c813dbc851dbf418fdc6dc883fd0592d6c555cd"
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                {
                  "fixed": "26ce90f1ce60b0ff587de8d6aec399aa55cab28e"
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                  "fixed": "c32ebe33626335a536dbbdd09571c06dd9bc1729"
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          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-38147.json"
          }
        },
        {
          "ranges": [
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              "type": "ECOSYSTEM",
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                  "introduced": "4.8.0"
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          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-38147.json"
          }
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      ],
      "modified": "2026-10-28T02:30:29.705540996Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/0c813dbc851dbf418fdc6dc883fd0592d6c555cd",
        "https://git.kernel.org/stable/c/26ce90f1ce60b0ff587de8d6aec399aa55cab28e",
        "https://git.kernel.org/stable/c/6e9f2df1c550ead7cecb3e450af1105735020c92",
        "https://git.kernel.org/stable/c/946bfdfcb76ac2bac5b8526447035885ff41c598",
        "https://git.kernel.org/stable/c/c32ebe33626335a536dbbdd09571c06dd9bc1729",
        "https://git.kernel.org/stable/c/dd8928897594931d6912ef2f7a43e110b4958d3d",
        "https://git.kernel.org/stable/c/e2ec310c7a50271843c585e27ef14e48c66ce649",
        "https://git.kernel.org/stable/c/fc2da88411470480b8b7e9177e930cedd893cf56",
        "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html",
        "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38147.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-38147",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38147.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-38147",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 496756,
  "published_at": "2025-07-03T08:35:52.921+00:00"
}