{
  "threat_severity" : "Important",
  "public_date" : "2026-05-21T12:24:11Z",
  "bugzilla" : {
    "description" : "bind: BIND 9 server memory exhaustion during GSS-API TKEY negotiation",
    "id" : "2479767",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2479767"
  },
  "cvss3" : {
    "cvss3_base_score" : "7.5",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
    "status" : "verified"
  },
  "cwe" : "CWE-770",
  "details" : [ "BIND servers that are configured to use TKEY-based authentication via GSS-API tokens are vulnerable to excessive memory consumption when receiving and processing maliciously-constructed packets.  Typically these servers will be found in Active Directory integrated DNS deployments and/or Kerberos-secured DNS environments.\nThis issue affects BIND 9 versions 9.0.0 through 9.16.50, 9.18.0 through 9.18.48, 9.20.0 through 9.20.22, 9.21.0 through 9.21.21, 9.9.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.48-S1, and 9.20.9-S1 through 9.20.22-S1.", "A flaw was found in BIND. A remote attacker can exploit this vulnerability by sending maliciously-constructed packets to BIND servers configured for TKEY-based authentication via GSS-API (Generic Security Service Application Program Interface) tokens. This can lead to excessive memory consumption, resulting in a Denial of Service (DoS) for the affected server." ],
  "statement" : "Important: BIND servers configured for TKEY-based GSS-API authentication are vulnerable to memory exhaustion when processing maliciously-constructed packets. This can lead to a denial of service, specifically impacting Red Hat deployments integrated with Active Directory or Kerberos for DNS where this authentication method is enabled.",
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 10",
    "release_date" : "2026-06-08T00:00:00Z",
    "advisory" : "RHSA-2026:24338",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10.2",
    "package" : "bind-32:9.18.33-15.el10_2.2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7 Extended Lifecycle Support",
    "release_date" : "2026-08-26T00:00:00Z",
    "advisory" : "RHSA-2026:60383",
    "cpe" : "cpe:/o:redhat:rhel_els:7",
    "package" : "bind-32:9.11.4-26.P2.el7_9.21"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2026-06-04T00:00:00Z",
    "advisory" : "RHSA-2026:23360",
    "cpe" : "cpe:/a:redhat:enterprise_linux:8",
    "package" : "bind9.16-32:9.16.23-0.22.el8_10.6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2026-06-08T00:00:00Z",
    "advisory" : "RHSA-2026:24339",
    "cpe" : "cpe:/a:redhat:enterprise_linux:8",
    "package" : "bind-32:9.11.36-16.el8_10.8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2026-06-08T00:00:00Z",
    "advisory" : "RHSA-2026:24339",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8",
    "package" : "bind-32:9.11.36-16.el8_10.8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2026-06-08T00:00:00Z",
    "advisory" : "RHSA-2026:24367",
    "cpe" : "cpe:/a:redhat:enterprise_linux:9",
    "package" : "bind-32:9.16.23-40.el9_8.2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2026-06-08T00:00:00Z",
    "advisory" : "RHSA-2026:24368",
    "cpe" : "cpe:/a:redhat:enterprise_linux:9",
    "package" : "bind9.18-32:9.18.29-14.el9_8.2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions",
    "release_date" : "2026-08-19T00:00:00Z",
    "advisory" : "RHSA-2026:57189",
    "cpe" : "cpe:/a:redhat:rhel_e4s:9.4",
    "package" : "bind-32:9.16.23-18.el9_4.12"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.6 Extended Update Support",
    "release_date" : "2026-08-17T00:00:00Z",
    "advisory" : "RHSA-2026:55441",
    "cpe" : "cpe:/a:redhat:rhel_eus:9.6",
    "package" : "bind-32:9.16.23-31.el9_6.4"
  }, {
    "product_name" : "Red Hat Hardened Images",
    "release_date" : "2026-05-21T00:00:00Z",
    "advisory" : "RHSA-2026:20334",
    "cpe" : "cpe:/a:redhat:hummingbird:1",
    "package" : "bind-main-9.18.49-1.hum1"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Affected",
    "package_name" : "bind",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Not affected",
    "package_name" : "dhcp",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  }, {
    "product_name" : "Red Hat OpenShift Container Platform 4",
    "fix_state" : "Affected",
    "package_name" : "openshift/ose-rhel-coreos-8",
    "cpe" : "cpe:/a:redhat:openshift:4"
  }, {
    "product_name" : "Red Hat OpenShift Container Platform 4",
    "fix_state" : "Affected",
    "package_name" : "openshift/ose-rhel-coreos-9",
    "cpe" : "cpe:/a:redhat:openshift:4"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2026-3039\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-3039" ],
  "name" : "CVE-2026-3039",
  "mitigation" : {
    "value" : "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.\nExample:\n```bash\n# Edit /etc/named.conf and remove or comment out lines related to tkey-gssapi-keytab or tkey-gssapi-credential.\n# For example, remove or comment out:\n# key \"gssapi-key\" {\n#     algorithm GSSAPI;\n#     secret \"BASE64_ENCODED_KEY\";\n# };\n#\n# Then reload the named service:\nsystemctl reload named\n```\nReloading the `named` service may cause a brief interruption in DNS resolution.",
    "lang" : "en:us"
  },
  "csaw" : false
}