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CVE-2026-12520 Stack buffer overflow and off-by-one writes in Zephyr HL7800 modem AT response handlers

🗓️ 18 Aug 2026 19:41:07Reported by GoogleType 
osv
 osv
🔗 osv.dev👁 3 Views

HL7800 AT response handlers have stack buffer overflow and off-by-one writes exploitable via modem UART in kernel context.

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20 Aug 2026 10:17Current
6.7Medium risk
Vulners AI Score6.7
CVSS 3.16.4
3