yaSSL: AES key leak via cache-bank timing side channel attack
Published Dec 13, 2016
5.5
MEDIUMCVSS 3.1
EPSS 0.30%
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.
Affected products
No data.
Configuration 1
Configuration 2
Configuration 4
- 8.0
No data.
Red Hat Enterprise Linux 5
mysql55-mysql
Not affected
Red Hat Enterprise Linux 6
mysql
Not affected
Red Hat Enterprise Linux 7
mariadb
Not affected
Red Hat Enterprise Linux OpenStack Platform 5 (Icehouse)
mariadb-galera
Not affected
Red Hat Enterprise Linux OpenStack Platform 6 (Juno)
mariadb-galera
Not affected
Red Hat Enterprise Linux OpenStack Platform 7 (Kilo)
mariadb-galera
Not affected
Red Hat OpenStack Platform 10 (Newton)
mariadb-galera
Not affected
Red Hat OpenStack Platform 11 (Ocata)
mariadb-galera
Not affected
Red Hat OpenStack Platform 12 (Pike)
mariadb-galera
Not affected
Red Hat OpenStack Platform 8 (Liberty)
mariadb-galera
Not affected
Red Hat OpenStack Platform 9 (Mitaka)
mariadb-galera
Not affected
Red Hat Software Collections
mariadb55-mariadb
Not affected
Red Hat Software Collections
mysql55-mysql
Not affected
Red Hat Software Collections
rh-mariadb100-mariadb
Not affected
Red Hat Software Collections
rh-mariadb101-mariadb
Not affected
Red Hat Software Collections
rh-mysql56-mysql
Not affected
Red Hat Software Collections
rh-mysql57-mysql
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | mysql55-mysql | Not affected | n/a |
| Red Hat Enterprise Linux 6 | mysql | Not affected | n/a |
| Red Hat Enterprise Linux 7 | mariadb | Not affected | n/a |
| Red Hat Enterprise Linux OpenStack Platform 5 (Icehouse) | mariadb-galera | Not affected | n/a |
| Red Hat Enterprise Linux OpenStack Platform 6 (Juno) | mariadb-galera | Not affected | n/a |
| Red Hat Enterprise Linux OpenStack Platform 7 (Kilo) | mariadb-galera | Not affected | n/a |
| Red Hat OpenStack Platform 10 (Newton) | mariadb-galera | Not affected | n/a |
| Red Hat OpenStack Platform 11 (Ocata) | mariadb-galera | Not affected | n/a |
| Red Hat OpenStack Platform 12 (Pike) | mariadb-galera | Not affected | n/a |
| Red Hat OpenStack Platform 8 (Liberty) | mariadb-galera | Not affected | n/a |
| Red Hat OpenStack Platform 9 (Mitaka) | mariadb-galera | Not affected | n/a |
| Red Hat Software Collections | mariadb55-mariadb | Not affected | n/a |
| Red Hat Software Collections | mysql55-mysql | Not affected | n/a |
| Red Hat Software Collections | rh-mariadb100-mariadb | Not affected | n/a |
| Red Hat Software Collections | rh-mariadb101-mariadb | Not affected | n/a |
| Red Hat Software Collections | rh-mysql56-mysql | Not affected | n/a |
| Red Hat Software Collections | rh-mysql57-mysql | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
AV:L/AC:L/Au:N/C:P/I:N/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.30% (0.00304) | 20.95th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.30% (0.00304) | 21.84th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.10% (0.00105) | 26.22th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00043) | 11.59th | v3 (v2023.03.01) |
| Jun 18, 2024 | 0.04% (0.00043) | 9.76th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00043) | 7.76th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.03% (0.01034) | 41.69th | v2 (v2022.01.01) |
| Sep 10, 2022 | 1.03% (0.01034) | 39.91th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.03% (0.01034) | 37.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.03% (0.01034) | 20.32th | v2 (v2022.01.01) |
No CWE recorded.
References (11)
- http://www.debian.org/security/2016/dsa-3706 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html x_refsource_CONFIRMPatchThird Party Advisory
- http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881724.html#AppendixMSQL
- http://www.securityfocus.com/bid/93659 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1037050 vdb-entryx_refsource_SECTRACKBroken LinkThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2016-7440 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1386584 Issue Tracking
- https://mariadb.com/kb/en/mariadb/mariadb-10028-release-notes/ x_refsource_CONFIRMThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2016-7440
- https://wolfssl.com/wolfSSL/Blog/Entries/2016/9/26_wolfSSL_3.9.10_Vulnerability_Fixes.html x_refsource_CONFIRMVendor Advisory
- https://www.cve.org/CVERecord?id=CVE-2016-7440
| Link | Providers | Tags |
|---|---|---|
| http://www.debian.org/security/2016/dsa-3706 | vendor-advisoryx_refsource_DEBIANThird Party Advisory | |
| http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html | x_refsource_CONFIRMPatchThird Party Advisory | |
| http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881724.html#AppendixMSQL | ||
| http://www.securityfocus.com/bid/93659 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| http://www.securitytracker.com/id/1037050 | vdb-entryx_refsource_SECTRACKBroken LinkThird Party AdvisoryVDB Entry | |
| https://access.redhat.com/security/cve/CVE-2016-7440 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1386584 | Issue Tracking | |
| https://mariadb.com/kb/en/mariadb/mariadb-10028-release-notes/ | x_refsource_CONFIRMThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2016-7440 | ||
| https://wolfssl.com/wolfSSL/Blog/Entries/2016/9/26_wolfSSL_3.9.10_Vulnerability_Fixes.html | x_refsource_CONFIRMVendor Advisory | |
| https://www.cve.org/CVERecord?id=CVE-2016-7440 |
Change history (0)
No recorded changes yet.