CVE-2015-5738

Name: CVE-2015-5738
Creator: NVD / NIST
Published: 2016-07-26T17:59:00.137+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 2.43%

Last modified Jun 17, 2026

CVE-2015-5738 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. The RSA-CRT implementation in the Cavium Software Development Kit (SDK) 2.x, when used on OCTEON II CN6xxx Hardware on Linux to support TLS with Perfect Forward Secrecy (PFS), makes it easier for remote attackers to obtain private RSA keys by conducting a Lenstra side-channel attack.. EPSS estimates a 2.43% chance of exploitation in the next 30 days.

Description

The RSA-CRT implementation in the Cavium Software Development Kit (SDK) 2.x, when used on OCTEON II CN6xxx Hardware on Linux to support TLS with Perfect Forward Secrecy (PFS), makes it easier for remote attackers to obtain private RSA keys by conducting a Lenstra side-channel attack.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

2.43%

82.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-200

Affected Software

Vendor	Product	Versions
Marvell	Software Development Kit	2.0
F5	Traffix Signaling Delivery Controller	>= 3.3.2, <= 3.5.1
F5	Traffix Signaling Delivery Controller	>= 4.0.0, <= 4.4.0

References

http://fortiguard.com/advisory/rsa-crt-key-leak-under-certain-conditionsBroken Link
https://people.redhat.com/~fweimer/rsa-crt-leaks.pdfTechnical Description, Third Party Advisory
https://support.f5.com/kb/en-us/solutions/public/k/91/sol91245485.htmlThird Party Advisory
http://fortiguard.com/advisory/rsa-crt-key-leak-under-certain-conditionsBroken Link
https://people.redhat.com/~fweimer/rsa-crt-leaks.pdfTechnical Description, Third Party Advisory
https://support.f5.com/kb/en-us/solutions/public/k/91/sol91245485.htmlThird Party Advisory

Timeline

Published: Jul 26, 2016
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2015-5738?

How severe is CVE-2015-5738?

CVE-2015-5738 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.43% probability of exploitation in the next 30 days.

How do I fix CVE-2015-5738?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

How Strix Helps

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Source: NVD / NIST