{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-43411",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-43411"
  ],
  "published": "2026-05-08T14:22:57Z",
  "summary": "tipc: fix divide-by-zero in tipc_sk_filter_connect()",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: fix divide-by-zero in tipc_sk_filter_connect()\n\nA user can set conn_timeout to any value via\nsetsockopt(TIPC_CONN_TIMEOUT), including values less than 4.  When a\nSYN is rejected with TIPC_ERR_OVERLOAD and the retry path in\ntipc_sk_filter_connect() executes:\n\n    delay %= (tsk->conn_timeout / 4);\n\nIf conn_timeout is in the range [0, 3], the integer division yields 0,\nand the modulo operation triggers a divide-by-zero exception, causing a\nkernel oops/panic.\n\nFix this by clamping conn_timeout to a minimum of 4 at the point of use\nin tipc_sk_filter_connect().\n\nOops: divide error: 0000 [#1] SMP KASAN NOPTI\nCPU: 0 UID: 0 PID: 119 Comm: poc-F144 Not tainted 7.0.0-rc2+\nRIP: 0010:tipc_sk_filter_rcv (net/tipc/socket.c:2236 net/tipc/socket.c:2362)\nCall Trace:\n tipc_sk_backlog_rcv (include/linux/instrumented.h:82 include/linux/atomic/atomic-instrumented.h:32 include/net/sock.h:2357 net/tipc/socket.c:2406)\n __release_sock (include/net/sock.h:1185 net/core/sock.c:3213)\n release_sock (net/core/sock.c:3797)\n tipc_connect (net/tipc/socket.c:2570)\n __sys_connect (include/linux/file.h:62 include/linux/file.h:83 net/socket.c:2098)",
  "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": "6.1.167",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-43411"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/600feb0a66a98c6b7f6f02b5f3612e75f9b8540f"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/3bc9998041076ee05d3f312a22cee6b2ca35527f"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/579956f9f297eb1b6a5d24de313f3acccee1f9d5"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/a360d3815aae1f00dd71b7714a846482e85cc1f7"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c2ebfbe63deb7bfd4dc2532bae62a7ed67713272"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/2754e7b3d64748643df867d1ea6fec522914b635"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/338c5edeb6ae3f12a4b84dff9d71f6f7f8c202c3"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/6c5a9baa15de240e747263aba435a0951da8d8d2"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-12T04:54:46Z"
  }
}