{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-56643",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2024-56643"
  ],
  "published": "2024-12-27T15:03:32Z",
  "summary": "dccp: Fix memory leak in dccp_feat_change_recv",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndccp: Fix memory leak in dccp_feat_change_recv\n\nIf dccp_feat_push_confirm() fails after new value for SP feature was accepted\nwithout reconciliation ('entry == NULL' branch), memory allocated for that value\nwith dccp_feat_clone_sp_val() is never freed.\n\nHere is the kmemleak stack for this:\n\nunreferenced object 0xffff88801d4ab488 (size 8):\n  comm \"syz-executor310\", pid 1127, jiffies 4295085598 (age 41.666s)\n  hex dump (first 8 bytes):\n    01 b4 4a 1d 80 88 ff ff                          ..J.....\n  backtrace:\n    [<00000000db7cabfe>] kmemdup+0x23/0x50 mm/util.c:128\n    [<0000000019b38405>] kmemdup include/linux/string.h:465 [inline]\n    [<0000000019b38405>] dccp_feat_clone_sp_val net/dccp/feat.c:371 [inline]\n    [<0000000019b38405>] dccp_feat_clone_sp_val net/dccp/feat.c:367 [inline]\n    [<0000000019b38405>] dccp_feat_change_recv net/dccp/feat.c:1145 [inline]\n    [<0000000019b38405>] dccp_feat_parse_options+0x1196/0x2180 net/dccp/feat.c:1416\n    [<00000000b1f6d94a>] dccp_parse_options+0xa2a/0x1260 net/dccp/options.c:125\n    [<0000000030d7b621>] dccp_rcv_state_process+0x197/0x13d0 net/dccp/input.c:650\n    [<000000001f74c72e>] dccp_v4_do_rcv+0xf9/0x1a0 net/dccp/ipv4.c:688\n    [<00000000a6c24128>] sk_backlog_rcv include/net/sock.h:1041 [inline]\n    [<00000000a6c24128>] __release_sock+0x139/0x3b0 net/core/sock.c:2570\n    [<00000000cf1f3a53>] release_sock+0x54/0x1b0 net/core/sock.c:3111\n    [<000000008422fa23>] inet_wait_for_connect net/ipv4/af_inet.c:603 [inline]\n    [<000000008422fa23>] __inet_stream_connect+0x5d0/0xf70 net/ipv4/af_inet.c:696\n    [<0000000015b6f64d>] inet_stream_connect+0x53/0xa0 net/ipv4/af_inet.c:735\n    [<0000000010122488>] __sys_connect_file+0x15c/0x1a0 net/socket.c:1865\n    [<00000000b4b70023>] __sys_connect+0x165/0x1a0 net/socket.c:1882\n    [<00000000f4cb3815>] __do_sys_connect net/socket.c:1892 [inline]\n    [<00000000f4cb3815>] __se_sys_connect net/socket.c:1889 [inline]\n    [<00000000f4cb3815>] __x64_sys_connect+0x6e/0xb0 net/socket.c:1889\n    [<00000000e7b1e839>] do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46\n    [<0000000055e91434>] entry_SYSCALL_64_after_hwframe+0x67/0xd1\n\nClean up the allocated memory in case of dccp_feat_push_confirm() failure\nand bail out with an error reset code.\n\nFound by Linux Verification Center (linuxtesting.org) with Syzkaller.",
  "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": "6.1.120",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-56643"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/623be080ab3c13d71570bd32f7202a8efa8e2252"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c99507fff94b926fc92279c92d80f229c91cb85d"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/bc3d4423def1a9412a0ae454cb4477089ab79276"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/6ff67909ee2ffad911e3122616df41dee23ff4f6"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d3ec686a369fae5034303061f003cd3f94ddfd23"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/9ee68b0f23706a77f53c832457b9384178b76421"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/22be4727a8f898442066bcac34f8a1ad0bc72e14"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-12T04:54:46Z"
  }
}