{
  "fix": "ALAS2023-2026-1944",
  "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1944",
  "summary": "ALAS2023-2026-1944, released July 20, 2026, fixes 2 CVEs across 4 products. None of them is reported as exploited. Patch Radar priority: High.",
  "platform": "linux",
  "type": "advisory",
  "title": "Security update for 4 packages",
  "released": "2026-07-20T09:00:00Z",
  "priority": "High",
  "priorityTier": 3,
  "priorityReason": "Closes CVE-2026-55999, high severity",
  "supported": true,
  "cveCount": 2,
  "exploitedCveCount": 0,
  "kevCveCount": 0,
  "ransomwareCveCount": 0,
  "maxEpss": 0.00333,
  "maxCvss": 7.8,
  "vendorAdvisory": "https://alas.aws.amazon.com/AL2023/ALAS-2026-1944.html",
  "appliesTo": [
    {
      "product": "xorg-x11-server-Xwayland",
      "productUrl": "https://patchblox.com/security/product/linux/xorg-x11-server-xwayland",
      "release": "amzn 2023",
      "fixedVersion": "24.1.3-1.amzn2023.0.6",
      "supported": true
    },
    {
      "product": "xorg-x11-server-Xwayland-debuginfo",
      "productUrl": "https://patchblox.com/security/product/linux/xorg-x11-server-xwayland-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "24.1.3-1.amzn2023.0.6",
      "supported": true
    },
    {
      "product": "xorg-x11-server-Xwayland-debugsource",
      "productUrl": "https://patchblox.com/security/product/linux/xorg-x11-server-xwayland-debugsource",
      "release": "amzn 2023",
      "fixedVersion": "24.1.3-1.amzn2023.0.6",
      "supported": true
    },
    {
      "product": "xorg-x11-server-Xwayland-devel",
      "productUrl": "https://patchblox.com/security/product/linux/xorg-x11-server-xwayland-devel",
      "release": "amzn 2023",
      "fixedVersion": "24.1.3-1.amzn2023.0.6",
      "supported": true
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2026-55999",
      "url": "https://patchblox.com/security/cve/CVE-2026-55999",
      "title": "xorg-x11-server-Xwayland: Local attackers with a X connection able to provide PCX fonts to the X \nserver xorg-server before 21.2.24 and xwaylan...",
      "priority": "High",
      "severity": "important",
      "cvss": 7.8,
      "epss": 0.00333,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-56000",
      "url": "https://patchblox.com/security/cve/CVE-2026-56000",
      "title": "xorg-x11-server / xwayland GLX contextTags Use-After-Free in CommonMakeCurrent()",
      "priority": "High",
      "severity": "Moderate",
      "cvss": 7.8,
      "epss": 0.00308,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-10T13:56:55Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}