High 7.5Published Sep 16, 2016

CVE-2016-6302The tls_decrypt_ticket function in ssl/t1_lib.c in OpenSSL before 1.1.0 does not consider the HMAC size during validation of the ticket length, which allows remote attackers to cause a denial of serv…

Updated under an hour ago (Nov 2, 2026, 12:10 AM ET)

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It affects openssl and 2 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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The tls_decrypt_ticket function in ssl/t1_lib.c in OpenSSL before 1.1.0 does not consider the HMAC size during validation of the ticket length, which allows remote attackers to cause a denial of service via a ticket that is too short.

CVSS: 7.5 HIGH (v3.0, NVD)CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-20
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Jun 16, 2026
First seen by InfoSec Signals: Nov 1, 2026

Affected products

Affected products

openssl openssl openssl:openssl	1.0.1; 1.0.1a; 1.0.1b; 1.0.1c; 1.0.1d; 1.0.1e; 1.0.1f; 1.0.1g; and 22 more ranges	NVD
oracle linux oracle:linux	6; 7	NVD
oracle solaris oracle:solaris	10; 11.3	NVD

References

References

http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759	third-party-advisory
http://rhn.redhat.com/errata/RHSA-2016-1940.html
http://www-01.ibm.com/support/docview.wss?uid=swg21995039	third-party-advisory
http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html
http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html
http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html	patch, third-party-advisory
http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
http://www.oracle.com/technetwork/topics/security/bulletinoct2016-3090566.html	patch, third-party-advisory
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2016-3090545.html	patch, third-party-advisory
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The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.