{
  "threat_severity" : "Moderate",
  "public_date" : "2026-05-27T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: bareudp: fix NULL pointer dereference in bareudp_fill_metadata_dst()",
    "id" : "2481868",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2481868"
  },
  "cvss3" : {
    "cvss3_base_score" : "5.5",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
    "status" : "draft"
  },
  "cwe" : "CWE-476",
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\nbareudp: fix NULL pointer dereference in bareudp_fill_metadata_dst()\nbareudp_fill_metadata_dst() passes bareudp->sock to\nudp_tunnel6_dst_lookup() in the IPv6 path without a NULL check.\nThe socket is only created in bareudp_open() and NULLed in\nbareudp_stop(), so calling this function while the device is down\ntriggers a NULL dereference via sock->sk.\nBUG: kernel NULL pointer dereference, address: 0000000000000018\nRIP: 0010:udp_tunnel6_dst_lookup (net/ipv6/ip6_udp_tunnel.c:160)\nCall Trace:\n<TASK>\nbareudp_fill_metadata_dst (drivers/net/bareudp.c:532)\ndo_execute_actions (net/openvswitch/actions.c:901)\novs_execute_actions (net/openvswitch/actions.c:1589)\novs_packet_cmd_execute (net/openvswitch/datapath.c:700)\ngenl_family_rcv_msg_doit (net/netlink/genetlink.c:1114)\ngenl_rcv_msg (net/netlink/genetlink.c:1209)\nnetlink_rcv_skb (net/netlink/af_netlink.c:2550)\n</TASK>\nAdd a NULL check returning -ESHUTDOWN, consistent with the xmit paths\nin the same driver.", "A flaw was found in the bareudp driver of the Linux kernel. This vulnerability allows a local attacker to trigger a NULL pointer dereference in the `bareudp_fill_metadata_dst()` function. This occurs because the function attempts to access a NULL socket when the bareudp device is down, leading to a system crash and a Denial of Service (DoS)." ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 10",
    "fix_state" : "Fix deferred",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Not affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Fix deferred",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Fix deferred",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Fix deferred",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Fix deferred",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2026-45846\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-45846\nhttps://lore.kernel.org/linux-cve-announce/2026052713-CVE-2026-45846-ddca@gregkh/T" ],
  "name" : "CVE-2026-45846",
  "csaw" : false
}