CVE-2025-49177
Full vulnerability record from the local CVENow database.
Description
A flaw was found in the XFIXES extension. The XFixesSetClientDisconnectMode handler does not validate the request length, allowing a client to read unintended memory from previous requests.
Severity
MEDIUM
CVSS score
6.1
(v3.1)
Vulnerability status
Deferred
Source identifier
Published
2025-06-17 15:15:45.650000
Last modified
2026-11-04 22:17:35.407000
View original CVE JSON
{
"id": "CVE-2025-49177",
"sourceIdentifier": "[email protected]",
"published": "2025-06-17T15:15:45.650",
"lastModified": "2026-11-04T22:17:35.407",
"vulnStatus": "Deferred",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A flaw was found in the XFIXES extension. The XFixesSetClientDisconnectMode handler does not validate the request length, allowing a client to read unintended memory from previous requests."
},
{
"lang": "es",
"value": "Se detectó una falla en la extensión XFIXES. El controlador XFixesSetClientDisconnectMode no valida la longitud de la solicitud, lo que permite que un cliente lea memoria no deseada de solicitudes anteriores."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
{
"vendor": "X.Org",
"product": "xwayland",
"defaultStatus": "unaffected",
"collectionURL": "https://gitlab.freedesktop.org/xorg/xserver",
"packageName": "xwayland",
"versions": [
{
"version": "0",
"lessThan": "24.1.7",
"versionType": "semver",
"status": "affected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 10",
"defaultStatus": "affected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "xorg-x11-server-Xwayland",
"cpes": [
"cpe:/o:redhat:enterprise_linux:10.0"
],
"versions": [
{
"version": "0:24.1.5-4.el10_0",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 9",
"defaultStatus": "affected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "xorg-x11-server",
"cpes": [
"cpe:/a:redhat:enterprise_linux:9::appstream",
"cpe:/a:redhat:enterprise_linux:9::crb"
],
"versions": [
{
"version": "0:1.20.11-31.el9_6",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
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"defaultStatus": "affected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "xorg-x11-server-Xwayland",
"cpes": [
"cpe:/a:redhat:enterprise_linux:9::appstream",
"cpe:/a:redhat:enterprise_linux:9::crb"
],
"versions": [
{
"version": "0:23.2.7-4.el9_6",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 9.4 Extended Update Support",
"defaultStatus": "affected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "xorg-x11-server-Xwayland",
"cpes": [
"cpe:/a:redhat:rhel_eus:9.4::appstream"
],
"versions": [
{
"version": "0:22.1.9-6.el9_4",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 6",
"defaultStatus": "affected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "tigervnc",
"cpes": [
"cpe:/o:redhat:rhel_els:6"
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 6",
"defaultStatus": "affected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "xorg-x11-server",
"cpes": [
"cpe:/o:redhat:rhel_els:6"
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 7",
"defaultStatus": "affected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "tigervnc",
"cpes": [
"cpe:/o:redhat:rhel_els:7"
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 7",
"defaultStatus": "affected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "xorg-x11-server",
"cpes": [
"cpe:/o:redhat:rhel_els:7"
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 8",
"defaultStatus": "affected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "tigervnc",
"cpes": [
"cpe:/a:redhat:enterprise_linux:8"
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 8",
"defaultStatus": "affected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "xorg-x11-server",
"cpes": [
"cpe:/a:redhat:enterprise_linux:8"
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 8",
"defaultStatus": "affected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "xorg-x11-server-Xwayland",
"cpes": [
"cpe:/a:redhat:enterprise_linux:8"
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 9",
"defaultStatus": "affected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "tigervnc",
"cpes": [
"cpe:/a:redhat:enterprise_linux:9"
]
}
]
}
],
"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:N/A:L",
"baseScore": 6.1,
"baseSeverity": "MEDIUM",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"availabilityImpact": "LOW"
},
"exploitabilityScore": 1.8,
"impactScore": 4.2
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2025-06-17T14:57:08.270521Z",
"id": "CVE-2025-49177",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"weaknesses": [
{
"source": "[email protected]",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-200"
}
]
}
],
"references": [
{
"url": "https://access.redhat.com/errata/RHSA-2025:10258",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2025:9303",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2025:9304",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/security/cve/CVE-2025-49177",
"source": "[email protected]"
},
{
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2369955",
"source": "[email protected]"
},
{
"url": "https://gitlab.freedesktop.org/xorg/xserver/-/commit/ab02fb96b1c701c3bb47617d965522c34befa6af",
"source": "[email protected]"
},
{
"url": "https://www.x.org/wiki/Development/Security/",
"source": "[email protected]"
}
]
}