CVE-2026-50263

{"id": "CVE-2026-50263", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-50263", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-06-08T16:01:18.730750Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "secalert@redhat.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "affected": [{"source": "secalert@redhat.com", "affectedData": [{"cpes": ["cpe:/o:redhat:enterprise_linux:10.2"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 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"https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:rhel_aus:8.4::appstream", "cpe:/a:redhat:rhel_eus_long_life:8.4::appstream"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support", "versions": [{"status": "unaffected", "version": "0:1.20.10-5.el8_4", "lessThan": "*", "versionType": "rpm"}], "packageName": "xorg-x11-server", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:rhel_aus:8.4::appstream", "cpe:/a:redhat:rhel_eus_long_life:8.4::appstream"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support", "versions": [{"status": "unaffected", "version": "0:1.11.0-8.el8_4.16", "lessThan": "*", "versionType": "rpm"}], "packageName": "tigervnc", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:rhel_aus:8.4::appstream", "cpe:/a:redhat:rhel_eus_long_life:8.4::appstream"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On", "versions": [{"status": "unaffected", "version": "0:1.20.10-5.el8_4", "lessThan": "*", "versionType": "rpm"}], "packageName": "xorg-x11-server", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:rhel_aus:8.4::appstream", "cpe:/a:redhat:rhel_eus_long_life:8.4::appstream"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On", "versions": [{"status": "unaffected", "version": "0:1.11.0-8.el8_4.16", "lessThan": "*", "versionType": "rpm"}], "packageName": "tigervnc", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": 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"product": "Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On", "versions": [{"status": "unaffected", "version": "0:21.1.3-2.el8_6.7", "lessThan": "*", "versionType": "rpm"}], "packageName": "xorg-x11-server-Xwayland", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:rhel_aus:8.6::appstream", "cpe:/a:redhat:rhel_eus_long_life:8.6::appstream"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On", "versions": [{"status": "unaffected", "version": "0:1.12.0-6.el8_6.18", "lessThan": "*", "versionType": "rpm"}], "packageName": "tigervnc", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:rhel_e4s:8.8::appstream", "cpe:/a:redhat:rhel_tus:8.8::appstream"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8.8 Telecommunications Update Service", "versions": [{"status": "unaffected", "version": "0:1.20.11-19.el8_8", "lessThan": "*", "versionType": "rpm"}], "packageName": "xorg-x11-server", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:rhel_e4s:8.8::appstream", "cpe:/a:redhat:rhel_tus:8.8::appstream"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8.8 Telecommunications Update Service", "versions": [{"status": "unaffected", "version": "0:21.1.3-13.el8_8.1", "lessThan": "*", "versionType": "rpm"}], "packageName": "xorg-x11-server-Xwayland", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:rhel_e4s:8.8::appstream", "cpe:/a:redhat:rhel_tus:8.8::appstream"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8.8 Telecommunications Update Service", "versions": [{"status": "unaffected", "version": "0:1.12.0-15.el8_8.18", "lessThan": "*", "versionType": "rpm"}], "packageName": "tigervnc", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:rhel_e4s:8.8::appstream", "cpe:/a:redhat:rhel_tus:8.8::appstream"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions", "versions": [{"status": "unaffected", "version": "0:1.20.11-19.el8_8", "lessThan": "*", "versionType": "rpm"}], "packageName": "xorg-x11-server", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:rhel_e4s:8.8::appstream", "cpe:/a:redhat:rhel_tus:8.8::appstream"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions", "versions": [{"status": "unaffected", "version": "0:21.1.3-13.el8_8.1", "lessThan": "*", "versionType": "rpm"}], "packageName": "xorg-x11-server-Xwayland", "collectionURL": 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"defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:rhel_e4s:9.4::appstream"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions", "versions": [{"status": "unaffected", "version": "0:1.20.11-29.el9_4", "lessThan": "*", "versionType": "rpm"}], "packageName": "xorg-x11-server", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:rhel_e4s:9.4::appstream"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions", "versions": [{"status": "unaffected", "version": "0:22.1.9-8.el9_4.1", "lessThan": "*", "versionType": "rpm"}], "packageName": "xorg-x11-server-Xwayland", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:rhel_e4s:9.4::appstream"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions", "versions": [{"status": "unaffected", "version": "0:1.13.1-8.el9_4.10", "lessThan": "*", "versionType": "rpm"}], "packageName": "tigervnc", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:rhel_eus:9.6::appstream", "cpe:/a:redhat:rhel_eus:9.6::crb"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9.6 Extended Update Support", "versions": [{"status": "unaffected", "version": "0:1.20.11-34.el9_6", "lessThan": "*", "versionType": "rpm"}], "packageName": "xorg-x11-server", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:rhel_eus:9.6::appstream", "cpe:/a:redhat:rhel_eus:9.6::crb"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9.6 Extended Update Support", "versions": [{"status": "unaffected", "version": "0:23.2.7-6.el9_6.1", "lessThan": "*", "versionType": "rpm"}], "packageName": "xorg-x11-server-Xwayland", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:rhel_eus:9.6::appstream"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9.6 Extended Update Support", "versions": [{"status": "unaffected", "version": "0:1.14.1-11.el9_6", "lessThan": "*", "versionType": "rpm"}], "packageName": "tigervnc", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/o:redhat:enterprise_linux:6"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 6", "packageName": "xorg-x11-server", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unknown"}]}], "published": "2026-06-05T12:16:39.927", "references": [{"url": "https://access.redhat.com/errata/RHSA-2026:26562", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:26566", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:26590", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:26610", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:26709", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:28923", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:29844", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:36083", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:36085", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:36086", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:36087", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:36632", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:36633", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:36634", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:36768", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:36791", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:36792", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:36798", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:38502", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:38810", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:46377", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:46382", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:46385", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:46392", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:46456", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:46460", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:46473", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:49519", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/security/cve/CVE-2026-50263", "tags": ["Third Party Advisory"], "source": "secalert@redhat.com"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2485388", "tags": ["Issue Tracking", "Third Party Advisory"], "source": "secalert@redhat.com"}, {"url": "https://gitlab.freedesktop.org/xorg/xserver/-/commit/ecc634f1b2f7aa473d3a267eada98c4918bf9e05", "tags": ["Patch"], "source": "secalert@redhat.com"}, {"url": "https://lists.x.org/archives/xorg-announce/2026-June/003702.html", "tags": ["Mailing List", "Vendor Advisory"], "source": "secalert@redhat.com"}, {"url": "https://redhat.atlassian.net/browse/PSIRTSUPT-16950", "tags": ["Permissions Required"], "source": "secalert@redhat.com"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "secalert@redhat.com", "description": [{"lang": "en", "value": "CWE-416"}]}], "descriptions": [{"lang": "en", "value": "A use-after-free flaw was found in the X.Org X server and Xwayland in CreateSaverWindow(). A client can trigger a use-after-free read after changing window attributes and forcing the screen saver, leading to information disclosure."}], "lastModified": "2026-08-05T00:17:04.400", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:x.org:x_server:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2F16F762-98D6-437F-8771-0F6C70AF65FD", "versionEndExcluding": "21.1.23"}, {"criteria": "cpe:2.3:a:x.org:xwayland:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "ED4EB1F5-9BBA-4751-9BC6-1639C7E02E0C", "versionEndExcluding": "24.1.12"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "142AD0DD-4CF3-4D74-9442-459CE3347E3A"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F4CFF558-3C47-480D-A2F0-BABF26042943"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7F6FB57C-2BC7-487C-96DD-132683AEB35D"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D65C2163-CFC2-4ABB-8F4E-CB09CEBD006C"}], "operator": "OR"}]}], "sourceIdentifier": "secalert@redhat.com"}