X.Org Server XInput2 PassiveUngrabDevice Out-of-Bounds Write

{
  "id": "cc4584acafdb639b3bd8f25c24db0cbaa361da47e189f304c2a8881f1e5b49e6",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-93523",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "X.Org Server XInput2 PassiveUngrabDevice Out-of-Bounds Write",
    "summary": "A heap buffer overflow caused by a XIPassiveUngrabDevice request with an out-of-range modifier value in X.Org X Server before 21.1.15 and XWayland before 24.1.14 could be used by authenticated X clients to crash or potentially execute code in X server context.",
    "evidence": "cve:CVE-2026-93523",
    "products": [
      {
        "name": {
          "value": "xorg-x11-server",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      },
      {
        "name": {
          "value": "xwayland",
          "evidence": "/containers/cna/affected/1/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-93523",
      "aliases": [
        "CVE-2026-93523"
      ],
      "metrics": [
        {
          "format": "CVSS",
          "cvssV3_1": {
            "scope": "UNCHANGED",
            "version": "3.1",
            "baseScore": 7.8,
            "attackVector": "LOCAL",
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "integrityImpact": "HIGH",
            "userInteraction": "NONE",
            "attackComplexity": "LOW",
            "availabilityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "confidentialityImpact": "HIGH"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "affected": [
        {
          "repo": "https://gitlab.freedesktop.org/xorg/xserver",
          "vendor": "x.org",
          "product": "xorg-x11-server",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "21.1.25",
              "versionType": "rpm"
            }
          ],
          "packageName": "xorg-x11-server",
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://gitlab.freedesktop.org/xorg/xserver",
          "vendor": "x.org",
          "product": "xwayland",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "24.1.14",
              "versionType": "rpm"
            }
          ],
          "packageName": "xwayland",
          "defaultStatus": "unaffected"
        }
      ],
      "modified": "2026-10-28T16:16:42.058Z",
      "provider": "cve",
      "references": [
        "https://gitlab.freedesktop.org/xorg/xserver/-/commit/37a1847a60c6799aecf163a5cfa40077a9002675"
      ],
      "provider_metadata": {
        "cna": {
          "orgId": "404e59f5-483d-4b8a-8e7a-e67604dd8afb",
          "shortName": "suse",
          "dateUpdated": "2026-10-28T16:16:42.058Z"
        }
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-93523",
        "evidence": "/cveMetadata/cveId"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/containers/cna/metrics"
  },
  "source_id": "core-cve",
  "document_id": 460283,
  "published_at": "2026-10-28T16:16:42.058+00:00"
}