CVE-2016-7440

Name: CVE-2016-7440
Creator: NVD / NIST
Published: 2016-12-13T16:59:10.19+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.30%

Last modified Jun 17, 2026

CVE-2016-7440 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. The C software implementation of AES Encryption and Decryption in wolfSSL (formerly CyaSSL) before 3.9.10 makes it easier for local users to discover AES keys by leveraging cache-bank timing differences.. EPSS estimates a 0.30% chance of exploitation in the next 30 days.

Description

The C software implementation of AES Encryption and Decryption in wolfSSL (formerly CyaSSL) before 3.9.10 makes it easier for local users to discover AES keys by leveraging cache-bank timing differences.

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

0.30%

21.9th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Mariadb	Mariadb	>= 5.5.0, < 5.5.53
Mariadb	Mariadb	>= 10.0.0, < 10.0.28
Mariadb	Mariadb	>= 10.1.0, < 10.1.19
Oracle	Mysql	>= 5.5.0, <= 5.5.52
Oracle	Mysql	>= 5.6.0, <= 5.6.33
Oracle	Mysql	>= 5.7.0, <= 5.7.15
Wolfssl	Wolfssl	< 3.9.10
Debian	Debian Linux	8.0

References

http://www.debian.org/security/2016/dsa-3706Third Party Advisory
http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.htmlPatch, Third Party Advisory
http://www.securityfocus.com/bid/93659Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1037050Broken Link, Third Party Advisory, VDB Entry
https://mariadb.com/kb/en/mariadb/mariadb-10028-release-notes/Third Party Advisory
https://wolfssl.com/wolfSSL/Blog/Entries/2016/9/26_wolfSSL_3.9.10_Vulnerability_Fixes.htmlVendor Advisory
http://www.debian.org/security/2016/dsa-3706Third Party Advisory
http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.htmlPatch, Third Party Advisory
http://www.securityfocus.com/bid/93659Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1037050Broken Link, Third Party Advisory, VDB Entry
https://mariadb.com/kb/en/mariadb/mariadb-10028-release-notes/Third Party Advisory
https://wolfssl.com/wolfSSL/Blog/Entries/2016/9/26_wolfSSL_3.9.10_Vulnerability_Fixes.htmlVendor Advisory

Timeline

Published: Dec 13, 2016
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-7440?

How severe is CVE-2016-7440?

CVE-2016-7440 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.30% probability of exploitation in the next 30 days.

How do I fix CVE-2016-7440?

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.

Are you affected by CVE-2016-7440?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST