CVE-2025-62230

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-62230", "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "state": "PUBLISHED", "assignerShortName": "redhat", "dateReserved": "2025-10-09T04:46:44.074Z", "datePublished": "2025-10-30T05:19:40.445Z", "dateUpdated": "2026-11-05T16:35:47.958Z"}, "containers": {"cna": {"title": "Xorg: xwayland: use-after-free in xkb client resource removal", "metrics": [{"other": {"content": {"value": "Moderate", "namespace": "https://access.redhat.com/security/updates/classification/"}, "type": "Red Hat severity rating"}}, {"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.3, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H", "version": "3.1"}, "format": "CVSS"}], "descriptions": [{"lang": "en", "value": "A flaw was discovered in the X.Org X server\u2019s X Keyboard (Xkb) extension when handling client resource cleanup. The software frees certain data structures without properly detaching related resources, leading to a use-after-free condition. This can cause memory corruption or a crash when affected clients disconnect."}], "affected": [{"vendor": "X.Org", "product": "Xwayland", "versions": [{"status": "affected", "version": "0", "lessThan": "24.1.9", "versionType": "semver"}], "packageName": "xwayland", "collectionURL": "https://gitlab.freedesktop.org/xorg/xserver", "defaultStatus": "unaffected"}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 10", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "xorg-x11-server-Xwayland", "defaultStatus": "affected", "versions": [{"version": "0:24.1.5-5.el10_0", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/o:redhat:enterprise_linux:10.0"]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 10", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "xorg-x11-server-Xwayland", "defaultStatus": "affected", "versions": [{"version": 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"secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2025:19432"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2025:19433"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2025:19434"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2025:19435"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2025:19489"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2025:19623"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2025:19909"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": 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"url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00033.html"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "secalert@redhat.com", "type": "Secondary"}]}

{"acknowledgement": "Red Hat would like to thank Jan-Niklas Sohn (Trend Micro Zero Day Initiative) for reporting this issue.", "bugzilla": {"description": "xorg: xwayland: Use-after-free in Xkb client resource removal", "id": "2402653", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2402653"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.3", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H", "status": "draft"}, "cwe": "CWE-416", "details": ["A flaw was discovered in the X.Org X server\u2019s X Keyboard (Xkb) extension when handling client resource cleanup. The software frees certain data structures without properly detaching related resources, leading to a use-after-free condition. This can cause memory corruption or a crash when affected clients disconnect."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2025-62230", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "xorg-x11-server-Xwayland", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Affected", "impact": "important", "package_name": "tigervnc", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "xorg-x11-server", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "impact": "important", "package_name": "tigervnc", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "impact": "important", "package_name": "xorg-x11-server", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "impact": "important", "package_name": "tigervnc", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "xorg-x11-server", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "xorg-x11-server-Xwayland", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "impact": "important", "package_name": "tigervnc", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "xorg-x11-server", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "xorg-x11-server-Xwayland", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-10-29T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-62230\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-62230"], "statement": "The Red Hat Product Security team has rated this vulnerability as Moderate.The flaw is a use-after-free in Xkb client resource cleanup that could lead to integrity and availability impacts if exploited. However, the X.Org server does not run with root privileges in Red Hat Enterprise Linux 8 and 9, which limits the potential impact and prevents full system compromise.", "threat_severity": "Moderate"}

{"analysis": {"en": {"generated_at": "2026-04-20T16:18:22.616894+00:00", "value": {"mitigation_remediation": ["Apply the Red\u00a0Hat errata updates that address the XWayland Xkb use\u2011after\u2011free flaw, such as RHSA\u20112025\u201119432, RHSA\u20112025\u201119433, RHSA\u20112025\u201119434, and RHSA\u20112025\u201119435.", "Update the X.Org Xwayland package to the latest available release that includes the announced fix.", "If an immediate patch is unavailable, minimize exposure by restricting untrusted clients to the X server, or move the X server behind a firewall to prevent external connections."], "summary": {"action": "Patch", "impact": "Use\u2011after\u2011free memory corruption potentially causing crashes"}, "threat_synthesis": {"affected_systems": "The vulnerability affects Red\u00a0Hat Enterprise\u00a0Linux distributions, including RHEL\u00a06,\u00a07,\u00a08,\u00a09,\u00a010 and the X.Org Xwayland component. Specific version ranges are not listed in the supplied data; however, the referenced Red\u00a0Hat errata indicate that multiple RHEL releases have mitigations in place. Apart from RHEL, any installation of X.org Xwayland is potentially impacted.", "description_and_impact": "A flaw in the X.Org X server\u2019s X Keyboard (Xkb) extension frees a data structure without properly detaching related resources during client cleanup. The resulting use\u2011after\u2011free can corrupt memory or cause the X server to crash when a client disconnects, which leads to denial of service. The weakness is classified as CWE\u2011416.", "risk_and_exploitability": "The CVSS score of 7.3 indicates moderate to high severity, while the EPSS score of less than 1% suggests a low current likelihood of exploitation. The flaw is not listed in the CISA KEV catalog. Based on the description, it is inferred that an attacker requires a client connected to the X server that triggers the cleanup logic; thus the attack vector is most likely local to the host running the X server, or could be remote if the server accepts untrusted network connections. Exploitation would lead to a crash rather than code execution, but repeated crashes could disrupt availability and serve as a foothold for further attacks if the system is otherwise compromised."}}}}, "created": "2026-04-20T16:30:06.281497+00:00", "updated": "2026-04-20T16:30:06.281516+00:00", "vendors": []}