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Vulnerability record · CVE-2016-2109 · published 5 May 2016

CVE-2016-2109: Openssl vulnerability

OOpenssl · Openssl

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.

7.5 CVSS 3.0 High EPSS 29% · top 1.9% CWE-399 · CWE-399
7.5CVSS 3.0 base score, v2 7.8
29%EPSS exploitation probability, 30 days
NoNot in CISA KEV
8Affected product versions listed by NVD
110References
17 Jun 2026Last modified by NVD

Description

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.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

8 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759
http://lists.apple.com/archives/security-announce/2016/Jul/msg00000.html
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00001.html
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00008.html
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00010.html
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00011.html
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00013.html
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00014.html
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00015.html
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00016.html
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00017.html
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00018.html
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00019.html
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00029.html
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00030.html
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00036.html
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00055.html
http://packetstormsecurity.com/files/136912/Slackware-Security-Advisory-openssl-Updates.html
http://rhn.redhat.com/errata/RHSA-2016-0722.html
http://rhn.redhat.com/errata/RHSA-2016-0996.html
http://rhn.redhat.com/errata/RHSA-2016-2056.html
http://rhn.redhat.com/errata/RHSA-2016-2073.html
http://rhn.redhat.com/errata/RHSA-2016-2957.html
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160504-openssl
http://www.debian.org/security/2016/dsa-3566
http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html
http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html
http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html
http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html
http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
http://www.securityfocus.com/bid/87940
http://www.securityfocus.com/bid/91787
http://www.securitytracker.com/id/1035721
http://www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.542103
http://www.ubuntu.com/usn/USN-2959-1
https://bto.bluecoat.com/security-advisory/sa123

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Source: NIST National Vulnerability Database (record CVE-2016-2109), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.