CVE-2016-2109: OpenSSL

High severity, CVSS 7.5. EPSS: 29.2% chance of exploitation in the next 30 days.

The asn1_d2i_read_bio function in crypto/asn1/a_d2i_fp.c in the ASN.1 BIO implementation in OpenSSL before 1.0.1t and 1.0.2 before 1.0.2h allows remote attackers to cause a denial of service (memory consumption) via a short invalid encoding.

Affected products

• OpenSSL OpenSSL: up to and including 1.0.1s; version 1.0.2 only; version 1.0.2a only; version 1.0.2b only; version 1.0.2c only; version 1.0.2d only; …
• Red Hat Enterprise Linux Desktop: version 7.0 only; version 6.0 only
• Red Hat Enterprise Linux Hpc Node: version 7.0 only; version 6.0 only
• Red Hat Enterprise Linux Hpc Node Eus: version 7.2 only
• Red Hat Enterprise Linux Server: version 7.0 only; version 6.0 only
• Red Hat Enterprise Linux Server Aus: version 7.2 only
• Red Hat Enterprise Linux Server Eus: version 7.2 only
• Red Hat Enterprise Linux Workstation: version 7.0 only; version 6.0 only

Published 2016-05-05. Last modified 2026-06-17.