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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 75.0, "confidence_source": "inferred", "scores": [{"score": 75.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "n/a", "source": "cna", "vendor": "n/a"}, "product": "exynos", "vendor": "samsung"}], "analysis": {"en": {"generated_at": "2026-04-07T22:57:56.888407+00:00", "value": {"mitigation_remediation": ["Apply the latest Samsung firmware update for the affected Exynos chips and modems from Samsung\u2019s product security releases site", "If a patch is not yet available, consider blocking or filtering LTE traffic to prevent malicious packets from reaching the baseband", "Monitor system logs for baseband crash indicators and take corrective actions such as device reset or firmware blow\u2011by\u2011update", "Contact Samsung support for guidance if the device requires continued LTE service until a proper patch is deployed"], "summary": {"action": "Immediate Patch", "impact": "Denial of Service via baseband crash"}, "threat_synthesis": {"affected_systems": "The vulnerability affects Samsung Exynos mobile processors, wearable processors, and modem variants listed as Exynos 980, 990, 850, 1080, 2100, 1280, 2200, 1330, 1380, 1480, 2400, 1580, 2500, 9110, W920, W930, W1000 and modem lines 5123, 5300, 5400. All firmware versions of these chips are impacted; the defect is in the baseband firmware that handles LTE MAC traffic.", "description_and_impact": "An error in the L2 layer of several Samsung Exynos processors and modems causes a crash when the baseband controller receives LTE MAC packets with many malformed Control Elements. The flaw results in a loss of LTE radio functionality, effectively denying all cellular connectivity for the device until it is rebooted or the firmware is updated. The weakness stems from insufficient bounds checking and memory safety violations, reflected in the associated CWE identifiers for buffer overflows and resource exhaustion.", "risk_and_exploitability": "The CVSS score of 9.1 indicates a high severity vulnerability with likely remote exploitation. EPSS shows an exploitation probability of less than 1%, suggesting it is not widely observed, and the defect is not listed in the CISA KEV catalog. The attack vector is inferred to be via engineered LTE traffic; an attacker with the ability to inject or force malformed MAC packets over a cellular connection could trigger the crash. While the likelihood is low, the impact of a denial of service that disables all LTE-based communication for an affected device is significant, warranting prompt attention."}}}}, "created": "2026-04-07T07:16:04.533032+00:00", "updated": "2026-04-08T19:52:40.917300+00:00", "vendors": ["samsung", "samsung$PRODUCT$exynos"]}