{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-74283",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-74283"
  ],
  "published": "2026-08-15T06:04:33Z",
  "summary": "tipc: require net admin for TIPCv2 netlink mutators",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: require net admin for TIPCv2 netlink mutators\n\nTIPCv2 registers mutating generic-netlink operations without admin\npermission flags. Generic netlink only checks CAP_NET_ADMIN when an\noperation sets GENL_ADMIN_PERM or GENL_UNS_ADMIN_PERM, so a local\nunprivileged process can currently change TIPC state through commands\nsuch as TIPC_NL_NET_SET, TIPC_NL_KEY_SET, TIPC_NL_KEY_FLUSH, and\nbearer enable/disable.\n\nThe legacy TIPC netlink API already checks netlink_net_capable(...,\nCAP_NET_ADMIN) for administrative commands. Give the TIPCv2 mutators\nthe equivalent generic-netlink gate. Use GENL_UNS_ADMIN_PERM, which\nmaps to the same namespace-aware CAP_NET_ADMIN check that\nnetlink_net_capable() performs, so the behaviour matches the legacy\npath and keeps working for CAP_NET_ADMIN holders in a non-initial user\nnamespace (containers).\n\nA QEMU/KASAN repro run as uid/gid 65534 with zero effective\ncapabilities previously succeeded in changing the network id and node\nidentity, setting and flushing key material, and enabling/disabling a\nUDP bearer. With this patch applied the same operations fail with\n-EPERM.",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.178",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-74283"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/b06fb5f78a9af0929aaa47c92d0b7bca0617fb25"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/52864c6c13dcc292481eabfeb3c31a86c3ec06f2"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/e87dcc1a644d087de0bb6c94c6dd28c29b89597f"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/9b937de4b3ded62a24da6e8d9d623cdb2748fa74"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c9668a4adb2264625daeeabc7466b783badd4614"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/cebaefe1aceb650d5c99a4c0e1a4dde09e211818"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/56f0a2e0a1d004e025cd031c3a801ab73959269f"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/86b0c540e2ea397cde021eecd24145f7c16a3d4e"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-17T05:50:24Z"
  }
}