CVE-2026-32226

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shared resource with improper synchronization ('race condition') in .NET Framework allows an unauthorized attacker to deny service over a network."}, {"lang": "es", "value": "Ejecuci\u00f3n concurrente utilizando un recurso compartido con sincronizaci\u00f3n inadecuada ('condici\u00f3n de carrera') en .NET Framework permite a un atacante no autorizado denegar el servicio a trav\u00e9s de una red."}], "id": "CVE-2026-32226", "lastModified": "2026-07-25T11:10:00.100", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 3.6, "source": "secure@microsoft.com", "type": "Secondary"}], "ssvcV203": [{"source": 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{"bugzilla": {"description": "dotnet: .NET Framework: Denial of Service via race condition", "id": "2458361", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2458361"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.9", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-821", "details": ["A flaw was found in .NET Framework. This vulnerability, a race condition, allows an unauthorized attacker to exploit improper synchronization when shared resources are concurrently executed. This can lead to a Denial of Service (DoS) over a network, making the affected system or application unavailable to legitimate users."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."}, "name": "CVE-2026-32226", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "dotnet10.0", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "dotnet8.0", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "dotnet9.0", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "dotnet10.0", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "dotnet8.0", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "dotnet9.0", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "dotnet10.0", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "dotnet8.0", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "dotnet9.0", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-04-14T16:57:44Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-32226\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-32226\nhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32226"], "statement": "This Moderate impact flaw in .NET Framework allows an unauthorized attacker to cause a Denial of Service over a network. The vulnerability arises from a race condition due to improper synchronization when shared resources are concurrently executed. This affects Red Hat Enterprise Linux and Fedora systems utilizing .NET Framework.", "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,*]"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "product": ".net", "vendor": "microsoft"}, {"configurations": [{"platform": ["windows_10_version_1809_for_arm64-based_systems", "windows_10_version_1809_for_x64-based_systems"], "status": "affected", "versions": {"scheme": "generic", "value": "[4.7.0,4.7.4141.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "Microsoft .NET Framework 3.5 AND 4.7.2", "source": "cna", "vendor": "Microsoft"}, "product": ".net_framework", "vendor": "microsoft"}, {"configurations": [{"platform": ["windows_10_version_1809_for_32-bit_systems", "windows_10_version_1809_for_arm64-based_systems", "windows_10_version_1809_for_x64-based_systems", "windows_server,_version_20h2_(server_core_installation)"], "status": "affected", "versions": {"scheme": "generic", "value": "[4.8.0,4.8.4801.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "Microsoft .NET Framework 3.5 AND 4.8", "source": "cna", "vendor": "Microsoft"}, "product": ".net_framework", "vendor": "microsoft"}, {"configurations": [{"platform": ["windows_11_version_26h1_for_arm64-based_systems", "windows_11_version_26h1_for_x64-based_systems", "windows_server_2025", "windows_server_2025_(server_core_installation)"], "status": "affected", "versions": {"scheme": "generic", "value": "[4.8.1,4.8.9332.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "Microsoft .NET Framework 3.5 AND 4.8.1", "source": "cna", "vendor": "Microsoft"}, "product": ".net_framework", "vendor": "microsoft"}, {"configurations": [{"platform": ["windows_10_version_1607_for_x64-based_systems", "windows_server_2012_(server_core_installation)", "windows_server_2012_r2", "windows_server_2012_r2_(server_core_installation)"], "status": "affected", "versions": {"scheme": "generic", "value": "[4.8.0,4.8.4801.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "Microsoft .NET Framework 4.8", "source": "cna", "vendor": "Microsoft"}, "product": ".net_framework", "vendor": "microsoft"}], "analysis": {"en": {"generated_at": "2026-04-15T01:52:47.485166+00:00", "value": {"mitigation_remediation": ["Patch Microsoft\u202f.NET\u202fFramework to the latest security update provided by Microsoft via Windows Update or the Microsoft Update Catalog.", "If immediate patching is not possible, isolate the vulnerable application in a sandboxed environment or container to limit resource access and prevent denial of service impact on other services.", "Monitor application performance and logs for abnormal CPU or memory spikes that could indicate exploitation attempts; consider implementing rate limiting or watchdog mechanisms."], "summary": {"action": "Patch", "impact": "Denial of Service"}, "threat_synthesis": {"affected_systems": "Microsoft .NET Framework versions\u202f3.5,\u202f4.7.2,\u202f4.8 and\u202f4.8.1 are affected. Any application built on these runtimes and deployed on Windows systems may be vulnerable if the vulnerable framework is present.", "description_and_impact": "A race condition in the .NET Framework\u2019s handling of concurrent execution with a shared resource can be triggered by an unauthorized attacker, causing a denial of service. The flaw stems from improper synchronization and is categorized as CWE\u2011362 and CWE\u2011821. This flaw can lead to application stalls or crashes, making the service unavailable to legitimate users.", "risk_and_exploitability": "This vulnerability has a CVSS score of\u202f5.9, placing it in the moderate severity range. EPSS data is not available, and the flaw is not listed in the CISA KEV catalog, indicating no known widespread exploits yet. The likely attack vector is over a network, where a remote attacker could send crafted requests to trigger the race condition. Successful exploitation would result in a denial of service for actual users of the affected application."}}}}, "created": "2026-04-15T14:54:11.666307+00:00", "updated": "2026-04-15T15:00:06.174545+00:00", "vendors": ["microsoft", "microsoft$PRODUCT$.net", "microsoft$PRODUCT$.net_framework"]}