{
  "fix": "ELSA-2026-28923",
  "url": "https://patchblox.com/security/fix/linux/elsa-2026-28923",
  "summary": "ELSA-2026-28923, released June 24, 2026, fixes 9 CVEs across 7 products. None of them is reported as exploited. Patch Radar priority: High.",
  "platform": "linux",
  "type": "advisory",
  "title": "Security update for 7 packages",
  "released": "2026-06-24T00:00:00Z",
  "priority": "High",
  "priorityTier": 3,
  "priorityReason": "Closes CVE-2026-50259, high severity",
  "supported": true,
  "cveCount": 9,
  "exploitedCveCount": 0,
  "kevCveCount": 0,
  "ransomwareCveCount": 0,
  "maxEpss": 0.00165,
  "maxCvss": 7.8,
  "vendorAdvisory": "https://linux.oracle.com/errata/ELSA-2026-28923.html",
  "appliesTo": [
    {
      "product": "tigervnc",
      "productUrl": "https://patchblox.com/security/product/linux/tigervnc",
      "release": "ol 8",
      "fixedVersion": "0:1.15.0-10.el8_10",
      "supported": true
    },
    {
      "product": "tigervnc-icons",
      "productUrl": "https://patchblox.com/security/product/linux/tigervnc-icons",
      "release": "ol 8",
      "fixedVersion": "0:1.15.0-10.el8_10",
      "supported": true
    },
    {
      "product": "tigervnc-license",
      "productUrl": "https://patchblox.com/security/product/linux/tigervnc-license",
      "release": "ol 8",
      "fixedVersion": "0:1.15.0-10.el8_10",
      "supported": true
    },
    {
      "product": "tigervnc-selinux",
      "productUrl": "https://patchblox.com/security/product/linux/tigervnc-selinux",
      "release": "ol 8",
      "fixedVersion": "0:1.15.0-10.el8_10",
      "supported": true
    },
    {
      "product": "tigervnc-server",
      "productUrl": "https://patchblox.com/security/product/linux/tigervnc-server",
      "release": "ol 8",
      "fixedVersion": "0:1.15.0-10.el8_10",
      "supported": true
    },
    {
      "product": "tigervnc-server-minimal",
      "productUrl": "https://patchblox.com/security/product/linux/tigervnc-server-minimal",
      "release": "ol 8",
      "fixedVersion": "0:1.15.0-10.el8_10",
      "supported": true
    },
    {
      "product": "tigervnc-server-module",
      "productUrl": "https://patchblox.com/security/product/linux/tigervnc-server-module",
      "release": "ol 8",
      "fixedVersion": "0:1.15.0-10.el8_10",
      "supported": true
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2026-50259",
      "url": "https://patchblox.com/security/cve/CVE-2026-50259",
      "title": "Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: stack buffer overflow in xkb setmap request via mapwidths indexing",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.00165,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-50258",
      "url": "https://patchblox.com/security/cve/CVE-2026-50258",
      "title": "Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: stack buffer overflow in xkb key types due to unchecked shift levels",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.00161,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-50256",
      "url": "https://patchblox.com/security/cve/CVE-2026-50256",
      "title": "Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: stack buffer overflow in font alias resolution due to libxfont2 name length mismatch",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.00157,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-50260",
      "url": "https://patchblox.com/security/cve/CVE-2026-50260",
      "title": "Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free in freecounter()",
      "priority": "High",
      "severity": "Moderate",
      "cvss": 7.8,
      "epss": 0.00154,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-50261",
      "url": "https://patchblox.com/security/cve/CVE-2026-50261",
      "title": "Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free in syncchangecounter()",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.00154,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-50264",
      "url": "https://patchblox.com/security/cve/CVE-2026-50264",
      "title": "xorg-server: An out-of-bounds write flaw was found in the X.Org X server and Xwayland in DRIGetBuffers/DRIGetBuffersWithFormat",
      "priority": "High",
      "severity": "high",
      "cvss": 7.8,
      "epss": 0.00148,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-50257",
      "url": "https://patchblox.com/security/cve/CVE-2026-50257",
      "title": "Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free in misyncdestroyfence()",
      "priority": "High",
      "severity": "Moderate",
      "cvss": 7.8,
      "epss": 0.00142,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-50263",
      "url": "https://patchblox.com/security/cve/CVE-2026-50263",
      "title": "Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free information disclosure in createsaverwindow()",
      "priority": "High",
      "severity": "Moderate",
      "cvss": 7.8,
      "epss": 0.00141,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-50262",
      "url": "https://patchblox.com/security/cve/CVE-2026-50262",
      "title": "Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: out-of-bounds read/write in glx changedrawableattributes",
      "priority": "High",
      "severity": "Moderate",
      "cvss": 7.8,
      "epss": 0.00132,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-07T18:46:35Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}