{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-91947", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-09-15T11:07:01.913Z", "datePublished": "2026-09-15T15:18:05.774Z", "dateUpdated": "2026-09-15T15:18:05.774Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-09-15T15:18:05.774Z"}, "datePublic": "2026-09-01T00:00:00.000Z", "title": "FreeRDP Server before 3.31.0 Use-After-Free via DRDYNVC", "descriptions": [{"lang": "en", "value": "FreeRDP server versions before 3.31.0 contain a use-after-free vulnerability in the DRDYNVC parser that dereferences a channel pointer after releasing the synchronization lock. Authenticated clients can race AUDIN channel closure messages against DRDYNVC data parsing to trigger heap-use-after-free when accessing freed channel objects."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')", "cweId": "CWE-362", "type": "CWE"}]}], "affected": [{"vendor": "FreeRDP", "product": "FreeRDP", "defaultStatus": "unaffected", "versions": [{"versionType": "semver", "version": "2.0.0", "lessThan": "3.31.0", "status": "affected"}, {"versionType": "semver", "version": "3.31.0", "status": "unaffected"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.0.0", "versionEndExcluding": "3.31.0"}]}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N", "attackVector": "NETWORK", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 7.7, "baseSeverity": "HIGH"}}, {"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH"}}], "references": [{"url": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-6mpx-c8rj-whj5", "tags": ["vendor-advisory"], "name": "GitHub Security Advisory (GHSA-6mpx-c8rj-whj5)"}, {"name": "VulnCheck Advisory: FreeRDP Server before 3.31.0 Use-After-Free via DRDYNVC", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/freerdp-server-before-3.31.0-use-after-free-via-drdynvc"}], "credits": [{"lang": "en", "value": "sam4k", "type": "reporter"}], "x_generator": {"engine": "vulncheck-endgame"}}}}

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