{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-56000", "assignerOrgId": "404e59f5-483d-4b8a-8e7a-e67604dd8afb", "state": "PUBLISHED", "assignerShortName": "suse", "dateReserved": "2026-06-18T09:26:55.988Z", "datePublished": "2026-07-08T07:36:15.357Z", "dateUpdated": "2026-07-08T12:42:16.061Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "404e59f5-483d-4b8a-8e7a-e67604dd8afb", "shortName": "suse", "dateUpdated": "2026-07-08T08:12:50.380Z" }, "title": "xorg-x11-server / xwayland GLX contextTags Use-After-Free in CommonMakeCurrent()", "datePublic": "2026-07-08T07:30:00.000Z", "problemTypes": [ { "descriptions": [ { "lang": "en", "cweId": "CWE-416", "description": "CWE-416 Use after free", "type": "CWE" } ] } ], "impacts": [ { "capecId": "CAPEC-234", "descriptions": [ { "lang": "en", "value": "CAPEC-234 Hijacking a privileged process" } ] } ], "affected": [ { "vendor": "X.Org", "product": "xorg-x11-server", "packageName": "xorg-x11-server", "repo": "https://gitlab.freedesktop.org/xorg/xserver/", "versions": [ { "status": "affected", "version": "0", "lessThan": "21.1.24", "versionType": "rpm" } ], "defaultStatus": "unaffected" }, { "vendor": "X.Org", "product": "xwayland", "packageName": "xwayland", "repo": "https://gitlab.freedesktop.org/xorg/xserver/", "versions": [ { "status": "affected", "version": "0", "lessThan": "24.1.13", "versionType": "rpmver" } ], "defaultStatus": "unaffected" } ], "descriptions": [ { "lang": "en", "value": "Local attackers with a X connection able to provide GLX commit to the X server xorg-server before 21.2.24 and xwayland before 24.1.13 could cause a Heap Use After Free, due to CommonMakeCurrent() pointing into potentially reallocated memory.", "supportingMedia": [ { "type": "text/html", "base64": false, "value": "Local attackers with a X connection able to provide GLX commit to the X server xorg-server before 21.2.24 and xwayland before 24.1.13 could cause a Heap Use After Free, due to CommonMakeCurrent() pointing into potentially reallocated memory." } ] } ], "references": [ { "url": "https://gitlab.freedesktop.org/xorg/xserver/-/commit/2779affbdb4354e894f490e56f962527d6125043", "tags": [ "patch" ] }, { "url": "https://www.openwall.com/lists/oss-security/2026/07/08/2", "tags": [ "vendor-advisory" ] } ], "metrics": [ { "format": "CVSS", "scenarios": [ { "lang": "en", "value": "GENERAL" } ], "cvssV4_0": { "attackVector": "NETWORK", "attackComplexity": "HIGH", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "subConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "subIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "HIGH", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "CRITICAL", "baseScore": 9, "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H" } } ], "credits": [ { "lang": "en", "value": "Anonymous working with Trend Micro Zero Day Initiative.", "type": "finder" } ], "source": { "discovery": "EXTERNAL" }, "x_generator": { "engine": "Vulnogram 1.0.2" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-07-08T12:41:28.146819Z", "id": "CVE-2026-56000", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-08T12:42:16.061Z" } } ] } }