{
  "document": {
    "category": "csaf_vex",
    "csaf_version": "2.0",
    "distribution": {
      "text": "TuxCare License Agreement",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.",
        "title": "Terms of Use"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "https://tuxcare.com/contact/",
      "name": "TuxCare",
      "namespace": "https://tuxcare.com/"
    },
    "references": [
      {
        "category": "self",
        "summary": "Canonical URL",
        "url": "https://security.tuxcare.com/csaf/v2/els_os/oraclelinux7els/vex/2026/cve-2026-55204-els_os-oraclelinux7els.json"
      }
    ],
    "tracking": {
      "current_release_date": "2026-06-29T16:40:23Z",
      "generator": {
        "date": "2026-06-29T16:40:23Z",
        "engine": {
          "name": "pyCSAF"
        }
      },
      "id": "CVE-2026-55204-ELS_OS-ORACLELINUX7ELS",
      "initial_release_date": "2026-06-18T17:16:00Z",
      "revision_history": [
        {
          "date": "2026-06-18T17:16:00Z",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2026-06-26T12:31:43Z",
          "number": "2",
          "summary": "Official Publication"
        },
        {
          "date": "2026-06-29T16:40:23Z",
          "number": "3",
          "summary": "Update document"
        }
      ],
      "status": "final",
      "version": "3"
    },
    "title": "Security update on CVE-2026-55204"
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_name",
                "name": "Oracle Linux 7",
                "product": {
                  "name": "Oracle Linux 7",
                  "product_id": "Oracle-Linux-7",
                  "product_identification_helper": {
                    "cpe": "cpe:2.3:o:oracle:linux:7:*:*:*:*:*:*:*"
                  }
                }
              }
            ],
            "category": "product_family",
            "name": "Oracle Linux"
          }
        ],
        "category": "vendor",
        "name": "Oracle Corporation"
      },
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "haproxy-0:1.5.18-9.el7_9.1.tuxcare.els1.x86_64",
                "product": {
                  "name": "haproxy-0:1.5.18-9.el7_9.1.tuxcare.els1.x86_64",
                  "product_id": "haproxy-0:1.5.18-9.el7_9.1.tuxcare.els1.x86_64",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/tuxcare/haproxy@1.5.18-9.el7_9.1.tuxcare.els1?arch=x86_64"
                  }
                }
              }
            ],
            "category": "architecture",
            "name": "x86_64"
          }
        ],
        "category": "vendor",
        "name": "TuxCare"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "haproxy-0:1.5.18-9.el7_9.1.tuxcare.els1.x86_64 as a component of Oracle Linux 7",
          "product_id": "Oracle-Linux-7:haproxy-0:1.5.18-9.el7_9.1.tuxcare.els1.x86_64"
        },
        "product_reference": "haproxy-0:1.5.18-9.el7_9.1.tuxcare.els1.x86_64",
        "relates_to_product_reference": "Oracle-Linux-7"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-55204",
      "cwe": {
        "id": "CWE-476",
        "name": "NULL Pointer Dereference"
      },
      "notes": [
        {
          "category": "description",
          "text": "HAProxy through  3.4.0, fixed in commit 9a6d1fe, contains a null pointer dereference vulnerability in hpack_dht_insert() within src/hpack-tbl.c that fails to validate the return value of hpack_dht_defrag() when the memory pool is exhausted. An attacker can trigger HPACK dynamic table insertions under memory pressure to dereference a NULL pointer and crash HAProxy worker processes, causing denial of service.",
          "title": "Vulnerability description"
        },
        {
          "category": "other",
          "text": "TuxCare has assessed that this vulnerability does not impact any currently supported TuxCare products. This evaluation may change as new information becomes available. For additional details regarding this vulnerability and affected products, refer to the provided references.",
          "title": "Statement"
        }
      ],
      "product_status": {
        "known_not_affected": [
          "Oracle-Linux-7:haproxy-0:1.5.18-9.el7_9.1.tuxcare.els1.x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els/cve/CVE-2026-55204"
        },
        {
          "category": "external",
          "summary": "https://github.com/haproxy/haproxy/commit/9a6d1fe3f00d86ab4ea6ea6ea0a5d48fc058a513",
          "url": "https://github.com/haproxy/haproxy/commit/9a6d1fe3f00d86ab4ea6ea6ea0a5d48fc058a513"
        },
        {
          "category": "external",
          "summary": "https://www.vulncheck.com/advisories/haproxy-null-pointer-dereference-in-hpack-dht-insert-function",
          "url": "https://www.vulncheck.com/advisories/haproxy-null-pointer-dereference-in-hpack-dht-insert-function"
        }
      ],
      "release_date": "2026-06-18T17:16:00Z",
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        },
        {
          "category": "impact",
          "date": "2026-06-29T16:05:48.762181Z",
          "details": "unknown",
          "product_ids": [
            "Oracle-Linux-7:haproxy-0:1.5.18-9.el7_9.1.tuxcare.els1.x86_64"
          ]
        }
      ]
    }
  ]
}