{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.1.5-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  tcp: clear sock_ops cb flags before force-closing a child socket  A child socket inherits the listener's bpf_sock_ops_cb_flags via sk_clone_lock(). If its setup fails in tcp_v4_syn_recv_sock() / tcp_v6_syn_recv_sock(), the child is freed through put_and_exit, where inet_csk_prepare_forced_close() drops the socket lock and tcp_done() runs without it.  If BPF_SOCK_OPS_STATE_CB_FLAG was inherited, tcp_done() -\u003e tcp_set_state() calls tcp_call_bpf(), which expects the lock and trips sock_owned_by_me():    WARNING: include/net/sock.h:1799 at tcp_set_state+0x433/0x550   RIP: 0010:tcp_set_state+0x433/0x550 include/net/sock.h:1799   Call Trace:    \u003cIRQ\u003e    tcp_done+0xba/0x250 net/ipv4/tcp.c:5095    tcp_v4_syn_recv_sock+0x850/0xa50 net/ipv4/tcp_ipv4.c:1787    tcp_check_req+0xf30/0x1360 net/ipv4/tcp_minisocks.c:926    tcp_v4_rcv+0x1047/0x1b50 net/ipv4/tcp_ipv4.c:2164    \u003c/IRQ\u003e  The child is freed before it is ever established, so it should run no sock_ops callback. Clear its cb flags in inet_csk_prepare_for_destroy_sock(), the common point for the IPv4, IPv6 and chtls forced-close paths and for the MPTCP -\u003esyn_recv_sock() failure path (dispose_child), which reaches tcp_done() on a child that was never established too.",
  "id": "DEBIAN-CVE-2026-74268",
  "modified": "2026-09-15T08:47:47.756672329Z",
  "published": "2026-08-15T06:22:26.183Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-74268"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "upstream": [
    "CVE-2026-74268"
  ]
}