{
  "cveId": "CVE-2022-41556",
  "url": "https://patchblox.com/security/cve/CVE-2022-41556",
  "summary": "CVE-2022-41556 is fixed in 18 products on 1 platform, first by lighttpd 1.4.63-1ubuntu3.1, released October 6, 2022. It is not reported as exploited. Patch Radar priority: High.",
  "title": "lighttpd: A resource leak in gw_backend.c in lighttpd 1.4.56 through 1.4.66 could lead to a denial of service (connection-slot...",
  "description": "A resource leak in gw_backend.c in lighttpd 1.4.56 through 1.4.66 could lead to a denial of service (connection-slot exhaustion) after a large amount of anomalous TCP behavior by clients. It is related to RDHUP mishandling in certain HTTP/1.1 chunked situations. Use of mod_fastcgi is, for example, affected. This is fixed in 1.4.67.",
  "published": "2022-10-06T11:17:00Z",
  "severity": "Medium",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.0383,
  "epssPercentile": 0.90155,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "lighttpd",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "1.4.67-1",
      "fix": "DEBIAN-CVE-2022-41556",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-41556",
      "released": "2022-10-06T18:17:03Z"
    },
    {
      "platform": "linux",
      "product": "lighttpd",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "1.4.67-1",
      "fix": "DEBIAN-CVE-2022-41556",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-41556",
      "released": "2022-10-06T18:17:03Z"
    },
    {
      "platform": "linux",
      "product": "lighttpd",
      "release": "Debian 14",
      "fixedVersion": "1.4.67-1",
      "fix": "DEBIAN-CVE-2022-41556",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-41556",
      "released": "2022-10-06T18:17:03Z"
    },
    {
      "platform": "linux",
      "product": "lighttpd",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1.4.63-1ubuntu3.1",
      "fix": "lighttpd 1.4.63-1ubuntu3.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-lighttpd-1.4.63-1ubuntu3.1",
      "released": "2022-10-06T11:17:00Z"
    },
    {
      "platform": "linux",
      "product": "lighttpd-mod-authn-gssapi",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1.4.63-1ubuntu3.1",
      "fix": "lighttpd-mod-authn-gssapi 1.4.63-1ubuntu3.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-lighttpd-mod-authn-gssapi-1.4.63-1ubuntu3.1",
      "released": "2022-10-06T11:17:00Z"
    },
    {
      "platform": "linux",
      "product": "lighttpd-mod-authn-pam",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1.4.63-1ubuntu3.1",
      "fix": "lighttpd-mod-authn-pam 1.4.63-1ubuntu3.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-lighttpd-mod-authn-pam-1.4.63-1ubuntu3.1",
      "released": "2022-10-06T11:17:00Z"
    },
    {
      "platform": "linux",
      "product": "lighttpd-mod-authn-sasl",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1.4.63-1ubuntu3.1",
      "fix": "lighttpd-mod-authn-sasl 1.4.63-1ubuntu3.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-lighttpd-mod-authn-sasl-1.4.63-1ubuntu3.1",
      "released": "2022-10-06T11:17:00Z"
    },
    {
      "platform": "linux",
      "product": "lighttpd-mod-deflate",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1.4.63-1ubuntu3.1",
      "fix": "lighttpd-mod-deflate 1.4.63-1ubuntu3.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-lighttpd-mod-deflate-1.4.63-1ubuntu3.1",
      "released": "2022-10-06T11:17:00Z"
    },
    {
      "platform": "linux",
      "product": "lighttpd-mod-geoip",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1.4.63-1ubuntu3.1",
      "fix": "lighttpd-mod-geoip 1.4.63-1ubuntu3.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-lighttpd-mod-geoip-1.4.63-1ubuntu3.1",
      "released": "2022-10-06T11:17:00Z"
    },
    {
      "platform": "linux",
      "product": "lighttpd-mod-maxminddb",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1.4.63-1ubuntu3.1",
      "fix": "lighttpd-mod-maxminddb 1.4.63-1ubuntu3.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-lighttpd-mod-maxminddb-1.4.63-1ubuntu3.1",
      "released": "2022-10-06T11:17:00Z"
    },
    {
      "platform": "linux",
      "product": "lighttpd-mod-mbedtls",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1.4.63-1ubuntu3.1",
      "fix": "lighttpd-mod-mbedtls 1.4.63-1ubuntu3.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-lighttpd-mod-mbedtls-1.4.63-1ubuntu3.1",
      "released": "2022-10-06T11:17:00Z"
    },
    {
      "platform": "linux",
      "product": "lighttpd-mod-nss",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1.4.63-1ubuntu3.1",
      "fix": "lighttpd-mod-nss 1.4.63-1ubuntu3.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-lighttpd-mod-nss-1.4.63-1ubuntu3.1",
      "released": "2022-10-06T11:17:00Z"
    },
    {
      "platform": "linux",
      "product": "lighttpd-mod-openssl",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1.4.63-1ubuntu3.1",
      "fix": "lighttpd-mod-openssl 1.4.63-1ubuntu3.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-lighttpd-mod-openssl-1.4.63-1ubuntu3.1",
      "released": "2022-10-06T11:17:00Z"
    },
    {
      "platform": "linux",
      "product": "lighttpd-mod-trigger-b4-dl",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1.4.63-1ubuntu3.1",
      "fix": "lighttpd-mod-trigger-b4-dl 1.4.63-1ubuntu3.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-lighttpd-mod-trigger-b4-dl-1.4.63-1ubuntu3.1",
      "released": "2022-10-06T11:17:00Z"
    },
    {
      "platform": "linux",
      "product": "lighttpd-mod-vhostdb-pgsql",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1.4.63-1ubuntu3.1",
      "fix": "lighttpd-mod-vhostdb-pgsql 1.4.63-1ubuntu3.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-lighttpd-mod-vhostdb-pgsql-1.4.63-1ubuntu3.1",
      "released": "2022-10-06T11:17:00Z"
    },
    {
      "platform": "linux",
      "product": "lighttpd-mod-webdav",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1.4.63-1ubuntu3.1",
      "fix": "lighttpd-mod-webdav 1.4.63-1ubuntu3.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-lighttpd-mod-webdav-1.4.63-1ubuntu3.1",
      "released": "2022-10-06T11:17:00Z"
    },
    {
      "platform": "linux",
      "product": "lighttpd-mod-wolfssl",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1.4.63-1ubuntu3.1",
      "fix": "lighttpd-mod-wolfssl 1.4.63-1ubuntu3.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-lighttpd-mod-wolfssl-1.4.63-1ubuntu3.1",
      "released": "2022-10-06T11:17:00Z"
    },
    {
      "platform": "linux",
      "product": "lighttpd-modules-dbi",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1.4.63-1ubuntu3.1",
      "fix": "lighttpd-modules-dbi 1.4.63-1ubuntu3.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-lighttpd-modules-dbi-1.4.63-1ubuntu3.1",
      "released": "2022-10-06T11:17:00Z"
    },
    {
      "platform": "linux",
      "product": "lighttpd-modules-ldap",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1.4.63-1ubuntu3.1",
      "fix": "lighttpd-modules-ldap 1.4.63-1ubuntu3.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-lighttpd-modules-ldap-1.4.63-1ubuntu3.1",
      "released": "2022-10-06T11:17:00Z"
    },
    {
      "platform": "linux",
      "product": "lighttpd-modules-lua",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1.4.63-1ubuntu3.1",
      "fix": "lighttpd-modules-lua 1.4.63-1ubuntu3.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-lighttpd-modules-lua-1.4.63-1ubuntu3.1",
      "released": "2022-10-06T11:17:00Z"
    },
    {
      "platform": "linux",
      "product": "lighttpd-modules-mysql",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1.4.63-1ubuntu3.1",
      "fix": "lighttpd-modules-mysql 1.4.63-1ubuntu3.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-lighttpd-modules-mysql-1.4.63-1ubuntu3.1",
      "released": "2022-10-06T11:17:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}