CVE-2026-93518

Full vulnerability record from the local CVENow database.

Description

An integer truncation issue in XkbResizeKeyType() that could lead to a heap buffer overflow by authenticated X clients in X.org X server before 21.1.25 and XWayland before 24.1.14 could be exploited for crashes or potential code execution in the X server.

Severity

HIGH

CVSS score

7.8 (v3.1)

Vulnerability status

Awaiting Analysis

Source identifier

[email protected]

Published

2026-10-28 15:17:10.430000

Last modified

2026-10-28 15:21:55.940000

View original CVE JSON

{
  "id": "CVE-2026-93518",
  "sourceIdentifier": "[email protected]",
  "published": "2026-10-28T15:17:10.430",
  "lastModified": "2026-10-28T15:21:55.940",
  "vulnStatus": "Awaiting Analysis",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An integer truncation issue in XkbResizeKeyType() that could lead to a heap buffer overflow by authenticated X clients in X.org X server before 21.1.25 and XWayland before 24.1.14 could be exploited for crashes or potential code execution in the X server."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "x.org",
          "product": "xorg-x11-server",
          "defaultStatus": "unaffected",
          "packageName": "xorg-x11-server",
          "repo": "https://gitlab.freedesktop.org/xorg/xserver",
          "versions": [
            {
              "version": "0",
              "lessThan": "21.1.25",
              "versionType": "rpm",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "x.org",
          "product": "xwayland",
          "defaultStatus": "unaffected",
          "packageName": "xwayland",
          "repo": "https://gitlab.freedesktop.org/xorg/xserver",
          "versions": [
            {
              "version": "0",
              "lessThan": "24.1.14",
              "versionType": "rpm",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-122"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://gitlab.freedesktop.org/xorg/xserver/-/commit/89101a6c6618f543d7502f2077c7ef1a507af256",
      "source": "[email protected]"
    }
  ]
}