Xorg: xwayland: x.org x server: use-after-free vulnerability leads to server crash and potential memory corruption_CVE-2026-34001

{
    "lastseen": "",
    "description": "A flaw was found in the X.Org X server. This use-after-free vulnerability occurs in the XSYNC fence triggering logic, specifically within the miSyncTriggerFence() function. An attacker with access to the X11 server can exploit this without user interaction, leading to a server crash and potentially enabling memory corruption. This could result in a denial of service or further compromise of the system.",
    "published": "2026-04-23T14:54:00.333Z",
    "modified": "2026-04-23T14:54:00.333Z",
    "type": "cve",
    "title": "Xorg: xwayland: x.org x server: use-after-free vulnerability leads to server crash and potential memory corruption",
    "source": "redhat",
    "references": "https://access.redhat.com/security/cve/CVE-2026-34001\nhttps://bugzilla.redhat.com/show_bug.cgi?id=2451109",
    "id": "CVE-2026-34001",
    "bulletinFamily": "",
    "cwe": [
        "CWE-825"
    ],
    "cvelist": null,
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    "cvss": {
        "score": 7.8,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
        "version": "3.1"
    },
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        "confidentialityImpact": "",
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    "href": "",
    "category_name": "CVE",
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    "product": "Red Hat Enterprise Linux 10",
    "version": "",
    "vendor": "Red Hat",
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