No exploitation reportedFix available

CVE-2016-6302

No exploitation reported by the sources we read.

Published2016-09-16
WeaknessCWE-20

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC

2016-09-1605:59CVE publishedNVD
2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2016-6302?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2016-6302?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

OpenSSL

Branch	Affected	Fixed in	Source
1.0	= 1.0.1	no fix published	NVD
1.0	= 1.0.1a	no fix published	NVD
1.0	= 1.0.1b	no fix published	NVD
1.0	= 1.0.1c	no fix published	NVD
1.0	= 1.0.1d	no fix published	NVD
1.0	= 1.0.1e	no fix published	NVD
1.0	= 1.0.1f	no fix published	NVD
1.0	= 1.0.1g	no fix published	NVD
1.0	= 1.0.1h	no fix published	NVD
1.0	= 1.0.1i	no fix published	NVD
1.0	= 1.0.1j	no fix published	NVD
1.0	= 1.0.1k	no fix published	NVD

Oracle linux

Branch	Affected	Fixed in	Source
6.x	= 6	no fix published	NVD
7.x	= 7	no fix published	NVD

Oracle solaris

Branch	Affected	Fixed in	Source
10.x	= 10	no fix published	NVD
11.3	= 11.3	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

RHSA-2016:1940 Red Hat Product Security151 products fixed
Red Hat Security Advisory: openssl security update

Full record on NVD

Fix

Vendor fix Red Hat Product Security RHSA-2016:1940 · 151 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 For the update to take effect, all services linked to the OpenSSL library must be restarted, or the system rebooted.

Advisories and patches

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.07.5read 2026-10-23
NVDCVSS 2.05read 2026-10-23
NVDweakness (CWE)CWE-20read 2026-10-23
FIRST EPSSEPSS score27.8 %read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2016-09-16
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2016-6302?

Is CVE-2016-6302 actively exploited?

Active exploitation of CVE-2016-6302 has not been confirmed. Its EPSS score was 27.8% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2016-6302?

CVE-2016-6302 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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