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USN-8398-2

Vulnerability from osv_ubuntu – Published: 2026-06-09 13:48 – Updated: 2026-06-09 13:48 – Source website
VLAI
Summary
nginx regression
Details

USN-8398-1 fixed a vulnerability in nginx. The update introduced a regression causing nginx to crash when being used with external modules. This update reverts the fix for CVE-2026-49975 pending further investigation.

We apologize for the inconvenience.

Original advisory details:

It was discovered that nginx incorrectly handled certain cookie headers in the HTTP/2 implementation. A remote attacker could possibly use this issue to cause nginx to consume excessive resources, resulting in a denial of service.

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [],
          "ecosystem": "Ubuntu:22.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libnginx-mod-http-auth-pam",
            "binary_version": "1.18.0-6ubuntu14.14"
          },
          {
            "binary_name": "libnginx-mod-http-cache-purge",
            "binary_version": "1.18.0-6ubuntu14.14"
          },
          {
            "binary_name": "libnginx-mod-http-dav-ext",
            "binary_version": "1.18.0-6ubuntu14.14"
          },
          {
            "binary_name": "libnginx-mod-http-echo",
            "binary_version": "1.18.0-6ubuntu14.14"
          },
          {
            "binary_name": "libnginx-mod-http-fancyindex",
            "binary_version": "1.18.0-6ubuntu14.14"
          },
          {
            "binary_name": "libnginx-mod-http-geoip",
            "binary_version": "1.18.0-6ubuntu14.14"
          },
          {
            "binary_name": "libnginx-mod-http-geoip2",
            "binary_version": "1.18.0-6ubuntu14.14"
          },
          {
            "binary_name": "libnginx-mod-http-headers-more-filter",
            "binary_version": "1.18.0-6ubuntu14.14"
          },
          {
            "binary_name": "libnginx-mod-http-image-filter",
            "binary_version": "1.18.0-6ubuntu14.14"
          },
          {
            "binary_name": "libnginx-mod-http-ndk",
            "binary_version": "1.18.0-6ubuntu14.14"
          },
          {
            "binary_name": "libnginx-mod-http-perl",
            "binary_version": "1.18.0-6ubuntu14.14"
          },
          {
            "binary_name": "libnginx-mod-http-subs-filter",
            "binary_version": "1.18.0-6ubuntu14.14"
          },
          {
            "binary_name": "libnginx-mod-http-uploadprogress",
            "binary_version": "1.18.0-6ubuntu14.14"
          },
          {
            "binary_name": "libnginx-mod-http-upstream-fair",
            "binary_version": "1.18.0-6ubuntu14.14"
          },
          {
            "binary_name": "libnginx-mod-http-xslt-filter",
            "binary_version": "1.18.0-6ubuntu14.14"
          },
          {
            "binary_name": "libnginx-mod-mail",
            "binary_version": "1.18.0-6ubuntu14.14"
          },
          {
            "binary_name": "libnginx-mod-nchan",
            "binary_version": "1.18.0-6ubuntu14.14"
          },
          {
            "binary_name": "libnginx-mod-rtmp",
            "binary_version": "1.18.0-6ubuntu14.14"
          },
          {
            "binary_name": "libnginx-mod-stream",
            "binary_version": "1.18.0-6ubuntu14.14"
          },
          {
            "binary_name": "libnginx-mod-stream-geoip",
            "binary_version": "1.18.0-6ubuntu14.14"
          },
          {
            "binary_name": "libnginx-mod-stream-geoip2",
            "binary_version": "1.18.0-6ubuntu14.14"
          },
          {
            "binary_name": "nginx",
            "binary_version": "1.18.0-6ubuntu14.14"
          },
          {
            "binary_name": "nginx-common",
            "binary_version": "1.18.0-6ubuntu14.14"
          },
          {
            "binary_name": "nginx-core",
            "binary_version": "1.18.0-6ubuntu14.14"
          },
          {
            "binary_name": "nginx-extras",
            "binary_version": "1.18.0-6ubuntu14.14"
          },
          {
            "binary_name": "nginx-full",
            "binary_version": "1.18.0-6ubuntu14.14"
          },
          {
            "binary_name": "nginx-light",
            "binary_version": "1.18.0-6ubuntu14.14"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "nginx",
        "purl": "pkg:deb/ubuntu/nginx@1.18.0-6ubuntu14.14?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.18.0-6ubuntu14.14"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.18.0-6ubuntu11",
        "1.18.0-6ubuntu12",
        "1.18.0-6ubuntu14",
        "1.18.0-6ubuntu14.1",
        "1.18.0-6ubuntu14.2",
        "1.18.0-6ubuntu14.3",
        "1.18.0-6ubuntu14.4",
        "1.18.0-6ubuntu14.5",
        "1.18.0-6ubuntu14.6",
        "1.18.0-6ubuntu14.7",
        "1.18.0-6ubuntu14.8",
        "1.18.0-6ubuntu14.10",
        "1.18.0-6ubuntu14.11",
        "1.18.0-6ubuntu14.12",
        "1.18.0-6ubuntu14.13"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [],
          "ecosystem": "Ubuntu:24.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libnginx-mod-http-geoip",
            "binary_version": "1.24.0-2ubuntu7.11"
          },
          {
            "binary_name": "libnginx-mod-http-image-filter",
            "binary_version": "1.24.0-2ubuntu7.11"
          },
          {
            "binary_name": "libnginx-mod-http-perl",
            "binary_version": "1.24.0-2ubuntu7.11"
          },
          {
            "binary_name": "libnginx-mod-http-xslt-filter",
            "binary_version": "1.24.0-2ubuntu7.11"
          },
          {
            "binary_name": "libnginx-mod-mail",
            "binary_version": "1.24.0-2ubuntu7.11"
          },
          {
            "binary_name": "libnginx-mod-stream",
            "binary_version": "1.24.0-2ubuntu7.11"
          },
          {
            "binary_name": "libnginx-mod-stream-geoip",
            "binary_version": "1.24.0-2ubuntu7.11"
          },
          {
            "binary_name": "nginx",
            "binary_version": "1.24.0-2ubuntu7.11"
          },
          {
            "binary_name": "nginx-common",
            "binary_version": "1.24.0-2ubuntu7.11"
          },
          {
            "binary_name": "nginx-core",
            "binary_version": "1.24.0-2ubuntu7.11"
          },
          {
            "binary_name": "nginx-extras",
            "binary_version": "1.24.0-2ubuntu7.11"
          },
          {
            "binary_name": "nginx-full",
            "binary_version": "1.24.0-2ubuntu7.11"
          },
          {
            "binary_name": "nginx-light",
            "binary_version": "1.24.0-2ubuntu7.11"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "nginx",
        "purl": "pkg:deb/ubuntu/nginx@1.24.0-2ubuntu7.11?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.24.0-2ubuntu7.11"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.24.0-1ubuntu1",
        "1.24.0-2ubuntu1",
        "1.24.0-2ubuntu2",
        "1.24.0-2ubuntu3",
        "1.24.0-2ubuntu4",
        "1.24.0-2ubuntu6",
        "1.24.0-2ubuntu7",
        "1.24.0-2ubuntu7.1",
        "1.24.0-2ubuntu7.3",
        "1.24.0-2ubuntu7.4",
        "1.24.0-2ubuntu7.5",
        "1.24.0-2ubuntu7.6",
        "1.24.0-2ubuntu7.7",
        "1.24.0-2ubuntu7.8",
        "1.24.0-2ubuntu7.9",
        "1.24.0-2ubuntu7.10"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [],
          "ecosystem": "Ubuntu:25.10"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libnginx-mod-http-geoip",
            "binary_version": "1.28.0-6ubuntu1.6"
          },
          {
            "binary_name": "libnginx-mod-http-image-filter",
            "binary_version": "1.28.0-6ubuntu1.6"
          },
          {
            "binary_name": "libnginx-mod-http-perl",
            "binary_version": "1.28.0-6ubuntu1.6"
          },
          {
            "binary_name": "libnginx-mod-http-xslt-filter",
            "binary_version": "1.28.0-6ubuntu1.6"
          },
          {
            "binary_name": "libnginx-mod-mail",
            "binary_version": "1.28.0-6ubuntu1.6"
          },
          {
            "binary_name": "libnginx-mod-stream",
            "binary_version": "1.28.0-6ubuntu1.6"
          },
          {
            "binary_name": "libnginx-mod-stream-geoip",
            "binary_version": "1.28.0-6ubuntu1.6"
          },
          {
            "binary_name": "nginx",
            "binary_version": "1.28.0-6ubuntu1.6"
          },
          {
            "binary_name": "nginx-common",
            "binary_version": "1.28.0-6ubuntu1.6"
          },
          {
            "binary_name": "nginx-core",
            "binary_version": "1.28.0-6ubuntu1.6"
          },
          {
            "binary_name": "nginx-extras",
            "binary_version": "1.28.0-6ubuntu1.6"
          },
          {
            "binary_name": "nginx-full",
            "binary_version": "1.28.0-6ubuntu1.6"
          },
          {
            "binary_name": "nginx-light",
            "binary_version": "1.28.0-6ubuntu1.6"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "nginx",
        "purl": "pkg:deb/ubuntu/nginx@1.28.0-6ubuntu1.6?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.28.0-6ubuntu1.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.26.3-2ubuntu1",
        "1.26.3-3ubuntu1",
        "1.26.3-3ubuntu2",
        "1.26.3-3ubuntu3",
        "1.28.0-3ubuntu1",
        "1.28.0-4ubuntu1",
        "1.28.0-6ubuntu1",
        "1.28.0-6ubuntu1.1",
        "1.28.0-6ubuntu1.2",
        "1.28.0-6ubuntu1.3",
        "1.28.0-6ubuntu1.4",
        "1.28.0-6ubuntu1.5"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [],
          "ecosystem": "Ubuntu:26.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libnginx-mod-http-geoip",
            "binary_version": "1.28.3-2ubuntu1.4"
          },
          {
            "binary_name": "libnginx-mod-http-image-filter",
            "binary_version": "1.28.3-2ubuntu1.4"
          },
          {
            "binary_name": "libnginx-mod-http-perl",
            "binary_version": "1.28.3-2ubuntu1.4"
          },
          {
            "binary_name": "libnginx-mod-http-xslt-filter",
            "binary_version": "1.28.3-2ubuntu1.4"
          },
          {
            "binary_name": "libnginx-mod-mail",
            "binary_version": "1.28.3-2ubuntu1.4"
          },
          {
            "binary_name": "libnginx-mod-stream",
            "binary_version": "1.28.3-2ubuntu1.4"
          },
          {
            "binary_name": "libnginx-mod-stream-geoip",
            "binary_version": "1.28.3-2ubuntu1.4"
          },
          {
            "binary_name": "nginx",
            "binary_version": "1.28.3-2ubuntu1.4"
          },
          {
            "binary_name": "nginx-common",
            "binary_version": "1.28.3-2ubuntu1.4"
          },
          {
            "binary_name": "nginx-core",
            "binary_version": "1.28.3-2ubuntu1.4"
          },
          {
            "binary_name": "nginx-extras",
            "binary_version": "1.28.3-2ubuntu1.4"
          },
          {
            "binary_name": "nginx-full",
            "binary_version": "1.28.3-2ubuntu1.4"
          },
          {
            "binary_name": "nginx-light",
            "binary_version": "1.28.3-2ubuntu1.4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "nginx",
        "purl": "pkg:deb/ubuntu/nginx@1.28.3-2ubuntu1.4?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.28.3-2ubuntu1.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.28.0-6ubuntu1",
        "1.28.1-2ubuntu1",
        "1.28.1-3ubuntu1",
        "1.28.2-2ubuntu1",
        "1.28.3-2ubuntu1",
        "1.28.3-2ubuntu1.1",
        "1.28.3-2ubuntu1.2",
        "1.28.3-2ubuntu1.3"
      ]
    }
  ],
  "aliases": [],
  "details": "USN-8398-1 fixed a vulnerability in nginx. The update introduced a\nregression causing nginx to crash when being used with external modules.\nThis update reverts the fix for CVE-2026-49975 pending further\ninvestigation.\n\nWe apologize for the inconvenience.\n\nOriginal advisory details:\n\n It was discovered that nginx incorrectly handled certain cookie headers in\n the HTTP/2 implementation. A remote attacker could possibly use this issue\n to cause nginx to consume excessive resources, resulting in a denial of\n service.",
  "id": "USN-8398-2",
  "modified": "2026-06-09T13:48:05Z",
  "published": "2026-06-09T13:48:05Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8398-2"
    },
    {
      "type": "REPORT",
      "url": "https://launchpad.net/bugs/2155992"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "nginx regression",
  "upstream": []
}



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