{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-34856", "assignerOrgId": "25ac1063-e409-4190-8079-24548c77ea2e", "state": "PUBLISHED", "assignerShortName": "huawei", "dateReserved": "2026-03-31T01:11:13.701Z", "datePublished": "2026-04-13T03:56:26.306Z", "dateUpdated": "2026-04-13T03:56:26.306Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "25ac1063-e409-4190-8079-24548c77ea2e", "shortName": "huawei", "dateUpdated": "2026-04-13T03:56:26.306Z"}, "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-362", "description": "CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')", "type": "CWE"}]}], "affected": [{"vendor": "Huawei", "product": "HarmonyOS", "versions": [{"status": "affected", "version": "6.0.0"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "UAF vulnerability in the communication module.\nImpact: Successful exploitation of this vulnerability may affect availability.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "UAF vulnerability in the communication module.<br>Impact: Successful exploitation of this vulnerability may affect availability."}]}], "references": [{"url": "https://consumer.huawei.com/en/support/bulletin/2026/4/"}, {"url": "https://consumer.huawei.com/en/support/bulletinwearables/2026/4/"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "HIGH", "baseSeverity": "HIGH", "baseScore": 7.3, "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H"}}], "source": {"discovery": "UNKNOWN"}, "x_generator": {"engine": "Vulnogram 1.0.1"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "UAF vulnerability in the communication module.\nImpact: Successful exploitation of this vulnerability may affect availability."}], "id": "CVE-2026-34856", "lastModified": "2026-04-13T04:16:12.437", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.3, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H", "version": "3.1"}, "exploitabilityScore": 2.5, "impactScore": 4.7, "source": "psirt@huawei.com", "type": "Secondary"}]}, "published": "2026-04-13T04:16:12.437", "references": [{"source": "psirt@huawei.com", "url": "https://consumer.huawei.com/en/support/bulletin/2026/4/"}, {"source": "psirt@huawei.com", "url": "https://consumer.huawei.com/en/support/bulletinwearables/2026/4/"}], "sourceIdentifier": "psirt@huawei.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-362"}], "source": "psirt@huawei.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "6.0.0"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "HarmonyOS", "source": "cna", "vendor": "Huawei"}, "product": "harmonyos", "vendor": "huawei"}], "analysis": {"en": {"generated_at": "2026-04-13T05:20:23.386395+00:00", "value": {"mitigation_remediation": ["Apply the HarmonyOS security update released by Huawei in the April\u00a02026 consumer service bulletin.", "Reboot the device after applying the update to ensure the memory management changes take effect.", "Verify the device is running the patched firmware version before resuming normal use."], "summary": {"action": "Immediate Patch", "impact": "Availability disruption due to use\u2011after\u2011free in the communication module"}, "threat_synthesis": {"affected_systems": "All Huawei HarmonyOS devices referenced in the consumer service bulletins published in April\u00a02026 are affected. No specific device models or operating\u2011system versions were listed in the advisory, so all releases covered by that bulletin should be assumed vulnerable until a patch is applied.", "description_and_impact": "This vulnerability is a use\u2011after\u2011free condition in the HarmonyOS communication module. Properly managing object lifetimes is violated, which allows an attacker to corrupt memory after the object has been freed. The failure can cause the system or an affected application to crash or restart, resulting in a loss of availability for the device or user.", "risk_and_exploitability": "The CVSS base score of 7.3 points to a high\u2011severity flaw. Exploitation requires an attacker to deliver specially crafted input that triggers the use\u2011after\u2011free; the specific transport mechanism is unspecified, but it is likely tied to network or inter\u2011process communication. No EPSS score is available and the vulnerability is not in CISA\u2019s KEV catalog, which suggests it may not yet be widely exploited in the wild. Nevertheless, because the flaw can lead to a denial of service, the risk is significant to users who depend on continuous operation of the device."}}}}, "created": "2026-04-13T12:37:37.368828+00:00", "title": "Use\u2011After\u2011Free in Huawei HarmonyOS Communication Module Leading to Availability Disruption", "updated": "2026-04-13T12:53:24.845193+00:00", "vendors": ["huawei", "huawei$PRODUCT$harmonyos"]}