CVE-2018-9988: Arm Mbed TLS

High severity, CVSS 7.5. EPSS: 2.1% chance of exploitation in the next 30 days.

ARM mbed TLS before 2.1.11, before 2.7.2, and before 2.8.0 has a buffer over-read in ssl_parse_server_key_exchange() that could cause a crash on invalid input.

Affected products

• Arm Mbed TLS: before 2.1.11 (fixed in 2.1.11); from 2.7.0, before 2.7.2 (fixed in 2.7.2)
• Debian Debian Linux: version 8.0 only; version 9.0 only
• Trustedfirmware Mbed TLS: version 2.8.0 only

Published 2018-04-10. Last modified 2026-06-17.