Medium 5.5Published Sep 10, 2018

CVE-2016-7056A timing attack flaw was found in OpenSSL 1.0.1u and before that could allow a malicious user with local access to recover ECDSA P-256 private keys.

Updated under an hour ago (Nov 2, 2026, 12:10 AM ET)

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It affects openssl and 3 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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A timing attack flaw was found in OpenSSL 1.0.1u and before that could allow a malicious user with local access to recover ECDSA P-256 private keys.

CVSS: 5.5 MEDIUM (v3.0, NVD)CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness (CWE): CWE-385, CWE-320
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Jun 16, 2026
First seen by InfoSec Signals: Nov 1, 2026

Affected products

Affected products

openssl openssl openssl:openssl	through 1.0.1u	NVD
debian debian_linux debian:debian_linux	8.0; 9.0	NVD
redhat enterprise_linux redhat:enterprise_linux	6.0; 7.0	NVD
canonical ubuntu_linux canonical:ubuntu_linux	12.04; 14.04	NVD

References

References

http://rhn.redhat.com/errata/RHSA-2017-1415.html	third-party-advisory
http://www.securityfocus.com/bid/95375	third-party-advisory, vdb-entry
http://www.securitytracker.com/id/1037575	patch, third-party-advisory, vdb-entry
https://access.redhat.com/errata/RHSA-2017:1413	third-party-advisory
https://access.redhat.com/errata/RHSA-2017:1414	third-party-advisory
https://access.redhat.com/errata/RHSA-2017:1801	third-party-advisory
https://access.redhat.com/errata/RHSA-2017:1802	third-party-advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-7056	issue-tracking, patch, third-party-advisory
https://eprint.iacr.org/2016/1195	third-party-advisory
https://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/033_libcrypto.patch.sig	patch, third-party-advisory
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The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.