{
  "fix": "RLSA-2026:26610",
  "url": "https://patchblox.com/security/fix/linux/rlsa-2026-26610",
  "summary": "RLSA-2026:26610, released June 19, 2026, fixes 9 CVEs in xorg-x11-server (version 0:1.20.11-34.el9_8.2). None of them is reported as exploited. Patch Radar priority: High.",
  "platform": "linux",
  "type": "advisory",
  "title": "xorg-x11-server security update",
  "released": "2026-06-19T00:03:21Z",
  "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://errata.rockylinux.org/RLSA-2026:26610",
  "appliesTo": [
    {
      "product": "xorg-x11-server",
      "productUrl": "https://patchblox.com/security/product/linux/xorg-x11-server",
      "release": "rocky 9",
      "fixedVersion": "0:1.20.11-34.el9_8.2",
      "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": "2026-11-07T12:40:37Z"
}