{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2025-71144",
  "modified": "2026-10-07T14:35:31Z",
  "upstream": [
    "CVE-2025-71144"
  ],
  "published": "2026-01-14T15:09:12Z",
  "summary": "mptcp: ensure context reset on disconnect()",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: ensure context reset on disconnect()\n\nAfter the blamed commit below, if the MPC subflow is already in TCP_CLOSE\nstatus or has fallback to TCP at mptcp_disconnect() time,\nmptcp_do_fastclose() skips setting the `send_fastclose flag` and the later\n__mptcp_close_ssk() does not reset anymore the related subflow context.\n\nAny later connection will be created with both the `request_mptcp` flag\nand the msk-level fallback status off (it is unconditionally cleared at\nMPTCP disconnect time), leading to a warning in subflow_data_ready():\n\n  WARNING: CPU: 26 PID: 8996 at net/mptcp/subflow.c:1519 subflow_data_ready (net/mptcp/subflow.c:1519 (discriminator 13))\n  Modules linked in:\n  CPU: 26 UID: 0 PID: 8996 Comm: syz.22.39 Not tainted 6.18.0-rc7-05427-g11fc074f6c36 #1 PREEMPT(voluntary)\n  Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011\n  RIP: 0010:subflow_data_ready (net/mptcp/subflow.c:1519 (discriminator 13))\n  Code: 90 0f 0b 90 90 e9 04 fe ff ff e8 b7 1e f5 fe 89 ee bf 07 00 00 00 e8 db 19 f5 fe 83 fd 07 0f 84 35 ff ff ff e8 9d 1e f5 fe 90 <0f> 0b 90 e9 27 ff ff ff e8 8f 1e f5 fe 4c 89 e7 48 89 de e8 14 09\n  RSP: 0018:ffffc9002646fb30 EFLAGS: 00010293\n  RAX: 0000000000000000 RBX: ffff88813b218000 RCX: ffffffff825c8435\n  RDX: ffff8881300b3580 RSI: ffffffff825c8443 RDI: 0000000000000005\n  RBP: 000000000000000b R08: ffffffff825c8435 R09: 000000000000000b\n  R10: 0000000000000005 R11: 0000000000000007 R12: ffff888131ac0000\n  R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000\n  FS:  00007f88330af6c0(0000) GS:ffff888a93dd2000(0000) knlGS:0000000000000000\n  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n  CR2: 00007f88330aefe8 CR3: 000000010ff59000 CR4: 0000000000350ef0\n  Call Trace:\n   <TASK>\n   tcp_data_ready (net/ipv4/tcp_input.c:5356)\n   tcp_data_queue (net/ipv4/tcp_input.c:5445)\n   tcp_rcv_state_process (net/ipv4/tcp_input.c:7165)\n   tcp_v4_do_rcv (net/ipv4/tcp_ipv4.c:1955)\n   __release_sock (include/net/sock.h:1158 (discriminator 6) net/core/sock.c:3180 (discriminator 6))\n   release_sock (net/core/sock.c:3737)\n   mptcp_sendmsg (net/mptcp/protocol.c:1763 net/mptcp/protocol.c:1857)\n   inet_sendmsg (net/ipv4/af_inet.c:853 (discriminator 7))\n   __sys_sendto (net/socket.c:727 (discriminator 15) net/socket.c:742 (discriminator 15) net/socket.c:2244 (discriminator 15))\n   __x64_sys_sendto (net/socket.c:2247)\n   do_syscall_64 (arch/x86/entry/syscall_64.c:63 (discriminator 1) arch/x86/entry/syscall_64.c:94 (discriminator 1))\n   entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)\n  RIP: 0033:0x7f883326702d\n\nAddress the issue setting an explicit `fastclosing` flag at fastclose\ntime, and checking such flag after mptcp_do_fastclose().",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.12.62-1+rpt1~bookworm"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.12.62+rpt-rpi-2712",
            "binary_version": "1:6.12.62-1+rpt1~bookworm"
          },
          {
            "binary_name": "linux-image-6.12.62+rpt-rpi-v8",
            "binary_version": "1:6.12.62-1+rpt1~bookworm"
          },
          {
            "binary_name": "linux-image-6.12.62+rpt-rpi-v8-rt",
            "binary_version": "1:6.12.62-1+rpt1~bookworm"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.12.62-1+rpt1~bookworm": {
            "linux_commit": "a1073743767f9e7fdc7017ababd2a07ea0c97c1c",
            "upstream_version": "6.12.62",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.12.65"
          }
        }
      }
    },
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:13",
        "name": "linux"
      },
      "versions": [
        "1:6.12.62-1+rpt1"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.12.62+rpt-rpi-2712",
            "binary_version": "1:6.12.62-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.12.62+rpt-rpi-v8",
            "binary_version": "1:6.12.62-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.12.62+rpt-rpi-v8-rt",
            "binary_version": "1:6.12.62-1+rpt1"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.12.62-1+rpt1": {
            "linux_commit": "a1073743767f9e7fdc7017ababd2a07ea0c97c1c",
            "upstream_version": "6.12.62",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.12.65"
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-71144"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/226fff52e7ed9fc8cd63327133739b3d92537ffd"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/5c7c7135468f3fc6379cde9777a2c18bfe92d82f"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/1c7c3a9314d8a7fc0e9a508606466a967c8e774a"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f1a77dfc3b045c3dd5f6e64189b9f52b90399f07"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/86730ac255b0497a272704de9a1df559f5d6602e"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-24T06:48:58Z"
  }
}