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OESA-2026-2139 (CVE-2026-33999)

Vulnerability from osv_openeuler – Published: 2026-05-03 11:11 – Updated: 2026-08-06 11:11 – Source website
VLAI
Summary
xorg-x11-server security update
Details

X.Org X11 X server

Security Fix(es):

A flaw was found in the X.Org X server. This integer underflow vulnerability, specifically in the XKB compatibility map handling, allows an attacker with local or remote X11 server access to trigger a buffer read overrun. This can lead to memory-safety violations and potentially a denial of service (DoS) or other severe impacts.(CVE-2026-33999)

(CVE-2026-34000)

A flaw was found in the X.Org X server. This use-after-free vulnerability occurs in the XSYNC fence triggering logic, specifically within the miSyncTriggerFence() function. An attacker with access to the X11 server can exploit this without user interaction, leading to a server crash and potentially enabling memory corruption. This could result in a denial of service or further compromise of the system.(CVE-2026-34001)

(CVE-2026-34002)

A flaw was found in the X.Org X server's XKB key types request validation. A local attacker could send a specially crafted request to the X server, leading to an out-of-bounds memory access vulnerability. This could result in the disclosure of sensitive information or cause the server to crash, leading to a Denial of Service (DoS). In certain configurations, higher impact outcomes may be possible.(CVE-2026-34003)


{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "xorg-x11-server-1.20.11-44.oe2403.aarch64.rpm",
          "xorg-x11-server-Xdmx-1.20.11-44.oe2403.aarch64.rpm",
          "xorg-x11-server-Xephyr-1.20.11-44.oe2403.aarch64.rpm",
          "xorg-x11-server-Xnest-1.20.11-44.oe2403.aarch64.rpm",
          "xorg-x11-server-Xvfb-1.20.11-44.oe2403.aarch64.rpm",
          "xorg-x11-server-common-1.20.11-44.oe2403.aarch64.rpm",
          "xorg-x11-server-debuginfo-1.20.11-44.oe2403.aarch64.rpm",
          "xorg-x11-server-debugsource-1.20.11-44.oe2403.aarch64.rpm",
          "xorg-x11-server-devel-1.20.11-44.oe2403.aarch64.rpm",
          "xorg-x11-server-1.20.11-44.oe2403sp1.aarch64.rpm",
          "xorg-x11-server-Xdmx-1.20.11-44.oe2403sp1.aarch64.rpm",
          "xorg-x11-server-Xephyr-1.20.11-44.oe2403sp1.aarch64.rpm",
          "xorg-x11-server-Xnest-1.20.11-44.oe2403sp1.aarch64.rpm",
          "xorg-x11-server-Xvfb-1.20.11-44.oe2403sp1.aarch64.rpm",
          "xorg-x11-server-common-1.20.11-44.oe2403sp1.aarch64.rpm",
          "xorg-x11-server-debuginfo-1.20.11-44.oe2403sp1.aarch64.rpm",
          "xorg-x11-server-debugsource-1.20.11-44.oe2403sp1.aarch64.rpm",
          "xorg-x11-server-devel-1.20.11-44.oe2403sp1.aarch64.rpm",
          "xorg-x11-server-1.20.11-44.oe2403sp3.aarch64.rpm",
          "xorg-x11-server-Xdmx-1.20.11-44.oe2403sp3.aarch64.rpm",
          "xorg-x11-server-Xephyr-1.20.11-44.oe2403sp3.aarch64.rpm",
          "xorg-x11-server-Xnest-1.20.11-44.oe2403sp3.aarch64.rpm",
          "xorg-x11-server-Xvfb-1.20.11-44.oe2403sp3.aarch64.rpm",
          "xorg-x11-server-common-1.20.11-44.oe2403sp3.aarch64.rpm",
          "xorg-x11-server-debuginfo-1.20.11-44.oe2403sp3.aarch64.rpm",
          "xorg-x11-server-debugsource-1.20.11-44.oe2403sp3.aarch64.rpm",
          "xorg-x11-server-devel-1.20.11-44.oe2403sp3.aarch64.rpm"
        ],
        "noarch": [
          "xorg-x11-server-help-1.20.11-44.oe2403.noarch.rpm",
          "xorg-x11-server-source-1.20.11-44.oe2403.noarch.rpm",
          "xorg-x11-server-help-1.20.11-44.oe2403sp1.noarch.rpm",
          "xorg-x11-server-source-1.20.11-44.oe2403sp1.noarch.rpm",
          "xorg-x11-server-help-1.20.11-44.oe2403sp3.noarch.rpm",
          "xorg-x11-server-source-1.20.11-44.oe2403sp3.noarch.rpm"
        ],
        "src": [
          "xorg-x11-server-1.20.11-44.oe2403.src.rpm",
          "xorg-x11-server-1.20.11-44.oe2403sp1.src.rpm",
          "xorg-x11-server-1.20.11-44.oe2403sp3.src.rpm"
        ],
        "x86_64": [
          "xorg-x11-server-1.20.11-44.oe2403.x86_64.rpm",
          "xorg-x11-server-Xdmx-1.20.11-44.oe2403.x86_64.rpm",
          "xorg-x11-server-Xephyr-1.20.11-44.oe2403.x86_64.rpm",
          "xorg-x11-server-Xnest-1.20.11-44.oe2403.x86_64.rpm",
          "xorg-x11-server-Xvfb-1.20.11-44.oe2403.x86_64.rpm",
          "xorg-x11-server-common-1.20.11-44.oe2403.x86_64.rpm",
          "xorg-x11-server-debuginfo-1.20.11-44.oe2403.x86_64.rpm",
          "xorg-x11-server-debugsource-1.20.11-44.oe2403.x86_64.rpm",
          "xorg-x11-server-devel-1.20.11-44.oe2403.x86_64.rpm",
          "xorg-x11-server-1.20.11-44.oe2403sp1.x86_64.rpm",
          "xorg-x11-server-Xdmx-1.20.11-44.oe2403sp1.x86_64.rpm",
          "xorg-x11-server-Xephyr-1.20.11-44.oe2403sp1.x86_64.rpm",
          "xorg-x11-server-Xnest-1.20.11-44.oe2403sp1.x86_64.rpm",
          "xorg-x11-server-Xvfb-1.20.11-44.oe2403sp1.x86_64.rpm",
          "xorg-x11-server-common-1.20.11-44.oe2403sp1.x86_64.rpm",
          "xorg-x11-server-debuginfo-1.20.11-44.oe2403sp1.x86_64.rpm",
          "xorg-x11-server-debugsource-1.20.11-44.oe2403sp1.x86_64.rpm",
          "xorg-x11-server-devel-1.20.11-44.oe2403sp1.x86_64.rpm",
          "xorg-x11-server-1.20.11-44.oe2403sp3.x86_64.rpm",
          "xorg-x11-server-Xdmx-1.20.11-44.oe2403sp3.x86_64.rpm",
          "xorg-x11-server-Xephyr-1.20.11-44.oe2403sp3.x86_64.rpm",
          "xorg-x11-server-Xnest-1.20.11-44.oe2403sp3.x86_64.rpm",
          "xorg-x11-server-Xvfb-1.20.11-44.oe2403sp3.x86_64.rpm",
          "xorg-x11-server-common-1.20.11-44.oe2403sp3.x86_64.rpm",
          "xorg-x11-server-debuginfo-1.20.11-44.oe2403sp3.x86_64.rpm",
          "xorg-x11-server-debugsource-1.20.11-44.oe2403sp3.x86_64.rpm",
          "xorg-x11-server-devel-1.20.11-44.oe2403sp3.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS",
        "name": "xorg-x11-server",
        "purl": "pkg:rpm/openEuler/xorg-x11-server\u0026distro=openEuler-24.03-LTS"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.20.11-44.oe2403sp3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "xorg-x11-server-1.20.11-44.oe2403sp1.aarch64.rpm",
          "xorg-x11-server-Xdmx-1.20.11-44.oe2403sp1.aarch64.rpm",
          "xorg-x11-server-Xephyr-1.20.11-44.oe2403sp1.aarch64.rpm",
          "xorg-x11-server-Xnest-1.20.11-44.oe2403sp1.aarch64.rpm",
          "xorg-x11-server-Xvfb-1.20.11-44.oe2403sp1.aarch64.rpm",
          "xorg-x11-server-common-1.20.11-44.oe2403sp1.aarch64.rpm",
          "xorg-x11-server-debuginfo-1.20.11-44.oe2403sp1.aarch64.rpm",
          "xorg-x11-server-debugsource-1.20.11-44.oe2403sp1.aarch64.rpm",
          "xorg-x11-server-devel-1.20.11-44.oe2403sp1.aarch64.rpm"
        ],
        "noarch": [
          "xorg-x11-server-help-1.20.11-44.oe2403sp1.noarch.rpm",
          "xorg-x11-server-source-1.20.11-44.oe2403sp1.noarch.rpm"
        ],
        "src": [
          "xorg-x11-server-1.20.11-44.oe2403sp1.src.rpm"
        ],
        "x86_64": [
          "xorg-x11-server-1.20.11-44.oe2403sp1.x86_64.rpm",
          "xorg-x11-server-Xdmx-1.20.11-44.oe2403sp1.x86_64.rpm",
          "xorg-x11-server-Xephyr-1.20.11-44.oe2403sp1.x86_64.rpm",
          "xorg-x11-server-Xnest-1.20.11-44.oe2403sp1.x86_64.rpm",
          "xorg-x11-server-Xvfb-1.20.11-44.oe2403sp1.x86_64.rpm",
          "xorg-x11-server-common-1.20.11-44.oe2403sp1.x86_64.rpm",
          "xorg-x11-server-debuginfo-1.20.11-44.oe2403sp1.x86_64.rpm",
          "xorg-x11-server-debugsource-1.20.11-44.oe2403sp1.x86_64.rpm",
          "xorg-x11-server-devel-1.20.11-44.oe2403sp1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP1",
        "name": "xorg-x11-server",
        "purl": "pkg:rpm/openEuler/xorg-x11-server\u0026distro=openEuler-24.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.20.11-44.oe2403sp1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "xorg-x11-server-1.20.11-44.oe2403sp3.aarch64.rpm",
          "xorg-x11-server-Xdmx-1.20.11-44.oe2403sp3.aarch64.rpm",
          "xorg-x11-server-Xephyr-1.20.11-44.oe2403sp3.aarch64.rpm",
          "xorg-x11-server-Xnest-1.20.11-44.oe2403sp3.aarch64.rpm",
          "xorg-x11-server-Xvfb-1.20.11-44.oe2403sp3.aarch64.rpm",
          "xorg-x11-server-common-1.20.11-44.oe2403sp3.aarch64.rpm",
          "xorg-x11-server-debuginfo-1.20.11-44.oe2403sp3.aarch64.rpm",
          "xorg-x11-server-debugsource-1.20.11-44.oe2403sp3.aarch64.rpm",
          "xorg-x11-server-devel-1.20.11-44.oe2403sp3.aarch64.rpm"
        ],
        "noarch": [
          "xorg-x11-server-help-1.20.11-44.oe2403sp3.noarch.rpm",
          "xorg-x11-server-source-1.20.11-44.oe2403sp3.noarch.rpm"
        ],
        "src": [
          "xorg-x11-server-1.20.11-44.oe2403sp3.src.rpm"
        ],
        "x86_64": [
          "xorg-x11-server-1.20.11-44.oe2403sp3.x86_64.rpm",
          "xorg-x11-server-Xdmx-1.20.11-44.oe2403sp3.x86_64.rpm",
          "xorg-x11-server-Xephyr-1.20.11-44.oe2403sp3.x86_64.rpm",
          "xorg-x11-server-Xnest-1.20.11-44.oe2403sp3.x86_64.rpm",
          "xorg-x11-server-Xvfb-1.20.11-44.oe2403sp3.x86_64.rpm",
          "xorg-x11-server-common-1.20.11-44.oe2403sp3.x86_64.rpm",
          "xorg-x11-server-debuginfo-1.20.11-44.oe2403sp3.x86_64.rpm",
          "xorg-x11-server-debugsource-1.20.11-44.oe2403sp3.x86_64.rpm",
          "xorg-x11-server-devel-1.20.11-44.oe2403sp3.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP3",
        "name": "xorg-x11-server",
        "purl": "pkg:rpm/openEuler/xorg-x11-server\u0026distro=openEuler-24.03-LTS-SP3"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.20.11-44.oe2403sp3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "xorg-x11-server-1.20.8-37.oe2003sp4.aarch64.rpm",
          "xorg-x11-server-Xephyr-1.20.8-37.oe2003sp4.aarch64.rpm",
          "xorg-x11-server-debuginfo-1.20.8-37.oe2003sp4.aarch64.rpm",
          "xorg-x11-server-debugsource-1.20.8-37.oe2003sp4.aarch64.rpm",
          "xorg-x11-server-devel-1.20.8-37.oe2003sp4.aarch64.rpm"
        ],
        "noarch": [
          "xorg-x11-server-help-1.20.8-37.oe2003sp4.noarch.rpm"
        ],
        "src": [
          "xorg-x11-server-1.20.8-37.oe2003sp4.src.rpm"
        ],
        "x86_64": [
          "xorg-x11-server-1.20.8-37.oe2003sp4.x86_64.rpm",
          "xorg-x11-server-Xephyr-1.20.8-37.oe2003sp4.x86_64.rpm",
          "xorg-x11-server-debuginfo-1.20.8-37.oe2003sp4.x86_64.rpm",
          "xorg-x11-server-debugsource-1.20.8-37.oe2003sp4.x86_64.rpm",
          "xorg-x11-server-devel-1.20.8-37.oe2003sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP4",
        "name": "xorg-x11-server",
        "purl": "pkg:rpm/openEuler/xorg-x11-server\u0026distro=openEuler-20.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.20.8-37.oe2003sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "xorg-x11-server-1.20.11-43.oe2203sp4.aarch64.rpm",
          "xorg-x11-server-Xdmx-1.20.11-43.oe2203sp4.aarch64.rpm",
          "xorg-x11-server-Xephyr-1.20.11-43.oe2203sp4.aarch64.rpm",
          "xorg-x11-server-Xnest-1.20.11-43.oe2203sp4.aarch64.rpm",
          "xorg-x11-server-Xvfb-1.20.11-43.oe2203sp4.aarch64.rpm",
          "xorg-x11-server-common-1.20.11-43.oe2203sp4.aarch64.rpm",
          "xorg-x11-server-debuginfo-1.20.11-43.oe2203sp4.aarch64.rpm",
          "xorg-x11-server-debugsource-1.20.11-43.oe2203sp4.aarch64.rpm",
          "xorg-x11-server-devel-1.20.11-43.oe2203sp4.aarch64.rpm"
        ],
        "noarch": [
          "xorg-x11-server-help-1.20.11-43.oe2203sp4.noarch.rpm",
          "xorg-x11-server-source-1.20.11-43.oe2203sp4.noarch.rpm"
        ],
        "src": [
          "xorg-x11-server-1.20.11-43.oe2203sp4.src.rpm"
        ],
        "x86_64": [
          "xorg-x11-server-1.20.11-43.oe2203sp4.x86_64.rpm",
          "xorg-x11-server-Xdmx-1.20.11-43.oe2203sp4.x86_64.rpm",
          "xorg-x11-server-Xephyr-1.20.11-43.oe2203sp4.x86_64.rpm",
          "xorg-x11-server-Xnest-1.20.11-43.oe2203sp4.x86_64.rpm",
          "xorg-x11-server-Xvfb-1.20.11-43.oe2203sp4.x86_64.rpm",
          "xorg-x11-server-common-1.20.11-43.oe2203sp4.x86_64.rpm",
          "xorg-x11-server-debuginfo-1.20.11-43.oe2203sp4.x86_64.rpm",
          "xorg-x11-server-debugsource-1.20.11-43.oe2203sp4.x86_64.rpm",
          "xorg-x11-server-devel-1.20.11-43.oe2203sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:22.03-LTS-SP4",
        "name": "xorg-x11-server",
        "purl": "pkg:rpm/openEuler/xorg-x11-server\u0026distro=openEuler-22.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.20.11-43.oe2203sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "High"
  },
  "details": "X.Org X11 X server\r\n\r\nSecurity Fix(es):\n\nA flaw was found in the X.Org X server. This integer underflow vulnerability, specifically in the XKB compatibility map handling, allows an attacker with local or remote X11 server access to trigger a buffer read overrun. This can lead to memory-safety violations and potentially a denial of service (DoS) or other severe impacts.(CVE-2026-33999)\n\n(CVE-2026-34000)\n\nA flaw was found in the X.Org X server. This use-after-free vulnerability occurs in the XSYNC fence triggering logic, specifically within the miSyncTriggerFence() function. An attacker with access to the X11 server can exploit this without user interaction, leading to a server crash and potentially enabling memory corruption. This could result in a denial of service or further compromise of the system.(CVE-2026-34001)\n\n(CVE-2026-34002)\n\nA flaw was found in the X.Org X server\u0026apos;s XKB key types request validation. A local attacker could send a specially crafted request to the X server, leading to an out-of-bounds memory access vulnerability. This could result in the disclosure of sensitive information or cause the server to crash, leading to a Denial of Service (DoS). In certain configurations, higher impact outcomes may be possible.(CVE-2026-34003)",
  "id": "OESA-2026-2139",
  "modified": "2026-08-06T11:11:07Z",
  "published": "2026-05-03T11:11:07Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2139"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33999"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34000"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34001"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34002"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34003"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "xorg-x11-server security update",
  "upstream": [
    "CVE-2026-33999",
    "CVE-2026-34000",
    "CVE-2026-34001",
    "CVE-2026-34002",
    "CVE-2026-34003"
  ]
}



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