CVE-2026-109088

Full vulnerability record from the local CVENow database.

Description

A malicious X server could send malformed RECORD EnableContext reolies that can cause a X client using the parse_reply_call_callback function in libXtst before 1.2.6 to enter a endless loop.

Severity

MEDIUM

CVSS score

6.5 (v3.1)

Vulnerability status

Awaiting Analysis

Source identifier

[email protected]

Published

2026-10-27 17:16:57.680000

Last modified

2026-10-28 14:15:58.863000

View original CVE JSON

{
  "id": "CVE-2026-109088",
  "sourceIdentifier": "[email protected]",
  "published": "2026-10-27T17:16:57.680",
  "lastModified": "2026-10-28T14:15:58.863",
  "vulnStatus": "Awaiting Analysis",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A malicious X server could send malformed  RECORD EnableContext reolies that can cause a X client using the parse_reply_call_callback function in libXtst before 1.2.6 to enter a endless loop."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "X.org",
          "product": "libXtst",
          "defaultStatus": "unaffected",
          "packageName": "libXtst",
          "repo": "https://gitlab.freedesktop.org/xorg/lib/libxtst",
          "versions": [
            {
              "version": "0",
              "lessThan": "1.2.6",
              "versionType": "rpm",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.6
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-835"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://gitlab.freedesktop.org/xorg/lib/libxtst/-/merge_requests/11",
      "source": "[email protected]"
    }
  ]
}