HighFix available

Red Hat Security Advisory: xorg-x11-server security update

Type: advisorySource: OSV1 source record

Announced 29 May 2026Source revision 1

RHSA-2026:21718

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:RHSA-2026:21718

xorg-x11-server

Source reference: /affected/0/package/name

Affected versions: Not stated in this record
Fixed versions: 0:1.20.11-7.el8_6
Source reference: /affected/0/ranges
Prerequisites: Not stated in this record

xorg-x11-server-Xdmx

Source reference: /affected/1/package/name

Affected versions: Not stated in this record
Fixed versions: 0:1.20.11-7.el8_6
Source reference: /affected/1/ranges
Prerequisites: Not stated in this record

xorg-x11-server-Xdmx-debuginfo

Source reference: /affected/2/package/name

Affected versions: Not stated in this record
Fixed versions: 0:1.20.11-7.el8_6
Source reference: /affected/2/ranges
Prerequisites: Not stated in this record

xorg-x11-server-Xephyr

Source reference: /affected/3/package/name

Affected versions: Not stated in this record
Fixed versions: 0:1.20.11-7.el8_6
Source reference: /affected/3/ranges
Prerequisites: Not stated in this record

xorg-x11-server-Xephyr-debuginfo

Source reference: /affected/4/package/name

Affected versions: Not stated in this record
Fixed versions: 0:1.20.11-7.el8_6
Source reference: /affected/4/ranges
Prerequisites: Not stated in this record

xorg-x11-server-Xnest

Source reference: /affected/5/package/name

Affected versions: Not stated in this record
Fixed versions: 0:1.20.11-7.el8_6
Source reference: /affected/5/ranges
Prerequisites: Not stated in this record

xorg-x11-server-Xnest-debuginfo

Source reference: /affected/6/package/name

Affected versions: Not stated in this record
Fixed versions: 0:1.20.11-7.el8_6
Source reference: /affected/6/ranges
Prerequisites: Not stated in this record

xorg-x11-server-Xorg

Source reference: /affected/7/package/name

Affected versions: Not stated in this record
Fixed versions: 0:1.20.11-7.el8_6
Source reference: /affected/7/ranges
Prerequisites: Not stated in this record

xorg-x11-server-Xorg-debuginfo

Source reference: /affected/8/package/name

Affected versions: Not stated in this record
Fixed versions: 0:1.20.11-7.el8_6
Source reference: /affected/8/ranges
Prerequisites: Not stated in this record

xorg-x11-server-Xvfb

Source reference: /affected/9/package/name

Affected versions: Not stated in this record
Fixed versions: 0:1.20.11-7.el8_6
Source reference: /affected/9/ranges
Prerequisites: Not stated in this record

xorg-x11-server-Xvfb-debuginfo

Source reference: /affected/10/package/name

Affected versions: Not stated in this record
Fixed versions: 0:1.20.11-7.el8_6
Source reference: /affected/10/ranges
Prerequisites: Not stated in this record

xorg-x11-server-common

Source reference: /affected/11/package/name

Affected versions: Not stated in this record
Fixed versions: 0:1.20.11-7.el8_6
Source reference: /affected/11/ranges
Prerequisites: Not stated in this record

xorg-x11-server-debuginfo

Source reference: /affected/12/package/name

Affected versions: Not stated in this record
Fixed versions: 0:1.20.11-7.el8_6
Source reference: /affected/12/ranges
Prerequisites: Not stated in this record

xorg-x11-server-debugsource

Source reference: /affected/13/package/name

Affected versions: Not stated in this record
Fixed versions: 0:1.20.11-7.el8_6
Source reference: /affected/13/ranges
Prerequisites: Not stated in this record

xorg-x11-server

Source reference: /affected/14/package/name

Affected versions: Not stated in this record
Fixed versions: 0:1.20.11-7.el8_6
Source reference: /affected/14/ranges
Prerequisites: Not stated in this record

xorg-x11-server-Xdmx

Source reference: /affected/15/package/name

Affected versions: Not stated in this record
Fixed versions: 0:1.20.11-7.el8_6
Source reference: /affected/15/ranges
Prerequisites: Not stated in this record

xorg-x11-server-Xdmx-debuginfo

Source reference: /affected/16/package/name

Affected versions: Not stated in this record
Fixed versions: 0:1.20.11-7.el8_6
Source reference: /affected/16/ranges
Prerequisites: Not stated in this record

xorg-x11-server-Xephyr

Source reference: /affected/17/package/name

Affected versions: Not stated in this record
Fixed versions: 0:1.20.11-7.el8_6
Source reference: /affected/17/ranges
Prerequisites: Not stated in this record

xorg-x11-server-Xephyr-debuginfo

Source reference: /affected/18/package/name

Affected versions: Not stated in this record
Fixed versions: 0:1.20.11-7.el8_6
Source reference: /affected/18/ranges
Prerequisites: Not stated in this record

xorg-x11-server-Xnest

Source reference: /affected/19/package/name

Affected versions: Not stated in this record
Fixed versions: 0:1.20.11-7.el8_6
Source reference: /affected/19/ranges
Prerequisites: Not stated in this record

xorg-x11-server-Xnest-debuginfo

Source reference: /affected/20/package/name

Affected versions: Not stated in this record
Fixed versions: 0:1.20.11-7.el8_6
Source reference: /affected/20/ranges
Prerequisites: Not stated in this record

xorg-x11-server-Xorg

Source reference: /affected/21/package/name

Affected versions: Not stated in this record
Fixed versions: 0:1.20.11-7.el8_6
Source reference: /affected/21/ranges
Prerequisites: Not stated in this record

xorg-x11-server-Xorg-debuginfo

Source reference: /affected/22/package/name

Affected versions: Not stated in this record
Fixed versions: 0:1.20.11-7.el8_6
Source reference: /affected/22/ranges
Prerequisites: Not stated in this record

xorg-x11-server-Xvfb

Source reference: /affected/23/package/name

Affected versions: Not stated in this record
Fixed versions: 0:1.20.11-7.el8_6
Source reference: /affected/23/ranges
Prerequisites: Not stated in this record

xorg-x11-server-Xvfb-debuginfo

Source reference: /affected/24/package/name

Affected versions: Not stated in this record
Fixed versions: 0:1.20.11-7.el8_6
Source reference: /affected/24/ranges
Prerequisites: Not stated in this record

xorg-x11-server-common

Source reference: /affected/25/package/name

Affected versions: Not stated in this record
Fixed versions: 0:1.20.11-7.el8_6
Source reference: /affected/25/ranges
Prerequisites: Not stated in this record

xorg-x11-server-debuginfo

Source reference: /affected/26/package/name

Affected versions: Not stated in this record
Fixed versions: 0:1.20.11-7.el8_6
Source reference: /affected/26/ranges
Prerequisites: Not stated in this record

xorg-x11-server-debugsource

Source reference: /affected/27/package/name

Affected versions: Not stated in this record
Fixed versions: 0:1.20.11-7.el8_6
Source reference: /affected/27/ranges
Prerequisites: Not stated in this record

xorg-x11-server

Source reference: /affected/28/package/name

Affected versions: Not stated in this record
Fixed versions: 0:1.20.11-7.el8_6
Source reference: /affected/28/ranges
Prerequisites: Not stated in this record

xorg-x11-server-Xdmx

Source reference: /affected/29/package/name

Affected versions: Not stated in this record
Fixed versions: 0:1.20.11-7.el8_6
Source reference: /affected/29/ranges
Prerequisites: Not stated in this record

xorg-x11-server-Xdmx-debuginfo

Source reference: /affected/30/package/name

Affected versions: Not stated in this record
Fixed versions: 0:1.20.11-7.el8_6
Source reference: /affected/30/ranges
Prerequisites: Not stated in this record

xorg-x11-server-Xephyr

Source reference: /affected/31/package/name

Affected versions: Not stated in this record
Fixed versions: 0:1.20.11-7.el8_6
Source reference: /affected/31/ranges
Prerequisites: Not stated in this record

xorg-x11-server-Xephyr-debuginfo

Source reference: /affected/32/package/name

Affected versions: Not stated in this record
Fixed versions: 0:1.20.11-7.el8_6
Source reference: /affected/32/ranges
Prerequisites: Not stated in this record

xorg-x11-server-Xnest

Source reference: /affected/33/package/name

Affected versions: Not stated in this record
Fixed versions: 0:1.20.11-7.el8_6
Source reference: /affected/33/ranges
Prerequisites: Not stated in this record

xorg-x11-server-Xnest-debuginfo

Source reference: /affected/34/package/name

Affected versions: Not stated in this record
Fixed versions: 0:1.20.11-7.el8_6
Source reference: /affected/34/ranges
Prerequisites: Not stated in this record

xorg-x11-server-Xorg

Source reference: /affected/35/package/name

Affected versions: Not stated in this record
Fixed versions: 0:1.20.11-7.el8_6
Source reference: /affected/35/ranges
Prerequisites: Not stated in this record

xorg-x11-server-Xorg-debuginfo

Source reference: /affected/36/package/name

Affected versions: Not stated in this record
Fixed versions: 0:1.20.11-7.el8_6
Source reference: /affected/36/ranges
Prerequisites: Not stated in this record

xorg-x11-server-Xvfb

Source reference: /affected/37/package/name

Affected versions: Not stated in this record
Fixed versions: 0:1.20.11-7.el8_6
Source reference: /affected/37/ranges
Prerequisites: Not stated in this record

xorg-x11-server-Xvfb-debuginfo

Source reference: /affected/38/package/name

Affected versions: Not stated in this record
Fixed versions: 0:1.20.11-7.el8_6
Source reference: /affected/38/ranges
Prerequisites: Not stated in this record

xorg-x11-server-common

Source reference: /affected/39/package/name

Affected versions: Not stated in this record
Fixed versions: 0:1.20.11-7.el8_6
Source reference: /affected/39/ranges
Prerequisites: Not stated in this record

xorg-x11-server-debuginfo

Source reference: /affected/40/package/name

Affected versions: Not stated in this record
Fixed versions: 0:1.20.11-7.el8_6
Source reference: /affected/40/ranges
Prerequisites: Not stated in this record

xorg-x11-server-debugsource

Source reference: /affected/41/package/name

Affected versions: Not stated in this record
Fixed versions: 0:1.20.11-7.el8_6
Source reference: /affected/41/ranges
Prerequisites: Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "0:1.20.11-7.el8_6"
          }
        ]
      }
    ],
    "package": {
      "name": "xorg-x11-server",
      "purl": "pkg:rpm/redhat/xorg-x11-server",
      "ecosystem": "Red Hat:rhel_aus:8.6::appstream"
    },
    "database_specific": {
      "source": "https://security.access.redhat.com/data/osv/RHSA-2026:21718.json"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "0:1.20.11-7.el8_6"
          }
        ]
      }
    ],
    "package": {
      "name": "xorg-x11-server-Xdmx",
      "purl": "pkg:rpm/redhat/xorg-x11-server-Xdmx",
      "ecosystem": "Red Hat:rhel_aus:8.6::appstream"
    },
    "database_specific": {
      "source": "https://security.access.redhat.com/data/osv/RHSA-2026:21718.json"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
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      }
    ],
    "package": {
      "name": "xorg-x11-server-Xdmx-debuginfo",
      "purl": "pkg:rpm/redhat/xorg-x11-server-Xdmx-debuginfo",
      "ecosystem": "Red Hat:rhel_aus:8.6::appstream"
    },
    "database_specific": {
      "source": "https://security.access.redhat.com/data/osv/RHSA-2026:21718.json"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "0:1.20.11-7.el8_6"
          }
        ]
      }
    ],
    "package": {
      "name": "xorg-x11-server-Xephyr",
      "purl": "pkg:rpm/redhat/xorg-x11-server-Xephyr",
      "ecosystem": "Red Hat:rhel_aus:8.6::appstream"
    },
    "database_specific": {
      "source": "https://security.access.redhat.com/data/osv/RHSA-2026:21718.json"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "0:1.20.11-7.el8_6"
          }
        ]
      }
    ],
    "package": {
      "name": "xorg-x11-server-Xephyr-debuginfo",
      "purl": "pkg:rpm/redhat/xorg-x11-server-Xephyr-debuginfo",
      "ecosystem": "Red Hat:rhel_aus:8.6::appstream"
    },
    "database_specific": {
      "source": "https://security.access.redhat.com/data/osv/RHSA-2026:21718.json"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "0:1.20.11-7.el8_6"
          }
        ]
      }
    ],
    "package": {
      "name": "xorg-x11-server-Xnest",
      "purl": "pkg:rpm/redhat/xorg-x11-server-Xnest",
      "ecosystem": "Red Hat:rhel_aus:8.6::appstream"
    },
    "database_specific": {
      "source": "https://security.access.redhat.com/data/osv/RHSA-2026:21718.json"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "0:1.20.11-7.el8_6"
          }
        ]
      }
    ],
    "package": {
      "name": "xorg-x11-server-Xnest-debuginfo",
      "purl": "pkg:rpm/redhat/xorg-x11-server-Xnest-debuginfo",
      "ecosystem": "Red Hat:rhel_aus:8.6::appstream"
    },
    "database_specific": {
      "source": "https://security.access.redhat.com/data/osv/RHSA-2026:21718.json"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "0:1.20.11-7.el8_6"
          }
        ]
      }
    ],
    "package": {
      "name": "xorg-x11-server-Xorg",
      "purl": "pkg:rpm/redhat/xorg-x11-server-Xorg",
      "ecosystem": "Red Hat:rhel_aus:8.6::appstream"
    },
    "database_specific": {
      "source": "https://security.access.redhat.com/data/osv/RHSA-2026:21718.json"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "0:1.20.11-7.el8_6"
          }
        ]
      }
    ],
    "package": {
      "name": "xorg-x11-server-Xorg-debuginfo",
      "purl": "pkg:rpm/redhat/xorg-x11-server-Xorg-debuginfo",
      "ecosystem": "Red Hat:rhel_aus:8.6::appstream"
    },
    "database_specific": {
      "source": "https://security.access.redhat.com/data/osv/RHSA-2026:21718.json"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "0:1.20.11-7.el8_6"
          }
        ]
      }
    ],
    "package": {
      "name": "xorg-x11-server-Xvfb",
      "purl": "pkg:rpm/redhat/xorg-x11-server-Xvfb",
      "ecosystem": "Red Hat:rhel_aus:8.6::appstream"
    },
    "database_specific": {
      "source": "https://security.access.redhat.com/data/osv/RHSA-2026:21718.json"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "0:1.20.11-7.el8_6"
          }
        ]
      }
    ],
    "package": {
      "name": "xorg-x11-server-Xvfb-debuginfo",
      "purl": "pkg:rpm/redhat/xorg-x11-server-Xvfb-debuginfo",
      "ecosystem": "Red Hat:rhel_aus:8.6::appstream"
    },
    "database_specific": {
      "source": "https://security.access.redhat.com/data/osv/RHSA-2026:21718.json"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "0:1.20.11-7.el8_6"
          }
        ]
      }
    ],
    "package": {
      "name": "xorg-x11-server-common",
      "purl": "pkg:rpm/redhat/xorg-x11-server-common",
      "ecosystem": "Red Hat:rhel_aus:8.6::appstream"
    },
    "database_specific": {
      "source": "https://security.access.redhat.com/data/osv/RHSA-2026:21718.json"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "0:1.20.11-7.el8_6"
          }
        ]
      }
    ],
    "package": {
      "name": "xorg-x11-server-debuginfo",
      "purl": "pkg:rpm/redhat/xorg-x11-server-debuginfo",
      "ecosystem": "Red Hat:rhel_aus:8.6::appstream"
    },
    "database_specific": {
      "source": "https://security.access.redhat.com/data/osv/RHSA-2026:21718.json"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "0:1.20.11-7.el8_6"
          }
        ]
      }
    ],
    "package": {
      "name": "xorg-x11-server-debugsource",
      "purl": "pkg:rpm/redhat/xorg-x11-server-debugsource",
      "ecosystem": "Red Hat:rhel_aus:8.6::appstream"
    },
    "database_specific": {
      "source": "https://security.access.redhat.com/data/osv/RHSA-2026:21718.json"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "0:1.20.11-7.el8_6"
          }
        ]
      }
    ],
    "package": {
      "name": "xorg-x11-server",
      "purl": "pkg:rpm/redhat/xorg-x11-server",
      "ecosystem": "Red Hat:rhel_e4s:8.6::appstream"
    },
    "database_specific": {
      "source": "https://security.access.redhat.com/data/osv/RHSA-2026:21718.json"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "0:1.20.11-7.el8_6"
          }
        ]
      }
    ],
    "package": {
      "name": "xorg-x11-server-Xdmx",
      "purl": "pkg:rpm/redhat/xorg-x11-server-Xdmx",
      "ecosystem": "Red Hat:rhel_e4s:8.6::appstream"
    },
    "database_specific": {
      "source": "https://security.access.redhat.com/data/osv/RHSA-2026:21718.json"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "0:1.20.11-7.el8_6"
          }
        ]
      }
    ],
    "package": {
      "name": "xorg-x11-server-Xdmx-debuginfo",
      "purl": "pkg:rpm/redhat/xorg-x11-server-Xdmx-debuginfo",
      "ecosystem": "Red Hat:rhel_e4s:8.6::appstream"
    },
    "database_specific": {
      "source": "https://security.access.redhat.com/data/osv/RHSA-2026:21718.json"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "0:1.20.11-7.el8_6"
          }
        ]
      }
    ],
    "package": {
      "name": "xorg-x11-server-Xephyr",
      "purl": "pkg:rpm/redhat/xorg-x11-server-Xephyr",
      "ecosystem": "Red Hat:rhel_e4s:8.6::appstream"
    },
    "database_specific": {
      "source": "https://security.access.redhat.com/data/osv/RHSA-2026:21718.json"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "0:1.20.11-7.el8_6"
          }
        ]
      }
    ],
    "package": {
      "name": "xorg-x11-server-Xephyr-debuginfo",
      "purl": "pkg:rpm/redhat/xorg-x11-server-Xephyr-debuginfo",
      "ecosystem": "Red Hat:rhel_e4s:8.6::appstream"
    },
    "database_specific": {
      "source": "https://security.access.redhat.com/data/osv/RHSA-2026:21718.json"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "0:1.20.11-7.el8_6"
          }
        ]
      }
    ],
    "package": {
      "name": "xorg-x11-server-Xnest",
      "purl": "pkg:rpm/redhat/xorg-x11-server-Xnest",
      "ecosystem": "Red Hat:rhel_e4s:8.6::appstream"
    },
    "database_specific": {
      "source": "https://security.access.redhat.com/data/osv/RHSA-2026:21718.json"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "0:1.20.11-7.el8_6"
          }
        ]
      }
    ],
    "package": {
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]

Related CVEs: CVE-2026-33999
Source reference: /upstream
CVE-2026-34000
Source reference: /upstream
CVE-2026-34001
Source reference: /upstream
CVE-2026-34002
Source reference: /upstream
CVE-2026-34003
Source reference: /upstream

Publisher severity

high

Source reference: /severity/0/score

Event: #73060 · Revision 1
Added to Heist Feed: Mon, 26 Oct 2026 00:21:55 GMT
Publisher date: Fri, 29 May 2026 10:11:00 GMT

Read the original announcement