Is CVE-2014-3509 in the CISA KEV catalog?

No. CVE-2014-3509 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2014-3509?

CVE-2014-3509 has a CVSS v2 base score of 6.8 (MEDIUM).

What is the EPSS score for CVE-2014-3509?

CVE-2014-3509 has an EPSS score of 13.36% (96th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2014-3509?

Upgrade openssl on debian 11 to 1.0.1i-1 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2014-3509

MEDIUMEPSS 96th pctl

6.8

CVSS v2

NVD

Description

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.

CWE-362Race Condition

How to fix

Remediation Available

opensslDebian

Fixed in:1.0.1i-1CVE-2014-3509

libssl1.0.0Ubuntu

Fixed in:1.0.1f-1ubuntu2.5USN-2308-1

opensslUbuntu

Fixed in:1.0.1f-1ubuntu2.5USN-2308-1

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

13.36%probability of exploitation in 30 days

96thpercentile

Very high risk: more likely to be exploited than 96% of all known CVEs.

References

Related Vulnerabilities

Other CWE-362 (Race Condition) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-6387	High	8.1	100%	-	Fix
CVE-2023-36884	High	7.5	99%	KEV + Ransom	Fix
CVE-2018-15473	Medium	5.3	99%	-	Fix
CVE-2024-27983	High	8.2	87%	-	Fix
CVE-2014-0226	Medium	6.8	86%	-	Fix
CVE-2016-5195	High	7.0	84%	KEV	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-06.