CVE-2014-3509: OpenSSL

Medium severity, CVSS 6.8. EPSS: 13.4% chance of exploitation in the next 30 days.

Race condition in the ssl_parse_serverhello_tlsext function in t1_lib.c in OpenSSL 1.0.0 before 1.0.0n and 1.0.1 before 1.0.1i, when multithreading and session resumption are used, allows remote SSL servers to cause a denial of service (memory overwrite and client application crash) or possibly have unspecified other impact by sending Elliptic Curve (EC) Supported Point Formats Extension data.

Affected products

• OpenSSL OpenSSL: version 1.0.0 only; version 1.0.0a only; version 1.0.0b only; version 1.0.0c only; version 1.0.0d only; version 1.0.0e only; …

Published 2014-08-13. Last modified 2026-06-17.