CVE-2026-34849

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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "6.0.0"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "5.1.0"}}], "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": "2026-04-14T17:23:48.860105+00:00", "value": {"mitigation_remediation": ["Inspect Huawei\u2019s security bulletin at https://consumer.huawei.com/en/support/bulletin/2026/4/ and download the official update for HarmonyOS 5.1.0 and 6.0.0.", "Install the OTA or firmware upgrade on all devices running the vulnerable OS versions.", "If the update is not yet released, disable or limit use of screen management features to prevent triggering the defect.", "Continuously monitor device logs for unexpected restarts or crashes and isolate affected units until the patch is applied."], "summary": {"action": "Apply Patch", "impact": "Availability Disruption"}, "threat_synthesis": {"affected_systems": "The affected systems are Huawei HarmonyOS versions 5.1.0 and 6.0.0, as identified by the corresponding CPE entries. Any device running these OS releases without the vendor\u2011provided patch is susceptible to the defect. The issue is confined to the operating system and does not affect hardware components.", "description_and_impact": "The vulnerability is a use\u2011after\u2011free in the screen management module of HarmonyOS. Improper handling of memory during screen transitions can corrupt the heap, triggering a crash that results in a loss of screen functionality. The impact is primarily an availability problem: affected devices can become unresponsive or must be rebooted to restore normal operation. This defect is classified as a race\u2011condition weakness (CWE\u2011362).", "risk_and_exploitability": "Risk assessment shows a CVSS score of 2.5, indicating a low overall severity. The EPSS score is below 1\u202f%, suggesting a very low probability of exploitation in the wild, and the vulnerability is not listed in CISA\u2019s KEV catalog. Although no public exploit has been reported, the likely attack vector would involve triggering the UAF condition through malicious or malformed screen operations, possibly requiring local access or privileged interaction. Because the damage is limited to availability, the risk to confidentiality or integrity is none; nevertheless, applying the vendor\u2011issued patch remains the safest approach."}}}}, "created": "2026-04-13T12:37:36.288997+00:00", "updated": "2026-04-15T15:45:07.537398+00:00", "vendors": ["huawei", "huawei$PRODUCT$harmonyos"]}