Medium 5.3Published Aug 28, 2017

CVE-2017-3735While parsing an IPAddressFamily extension in an X.509 certificate, it is possible to do a one-byte overread.

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

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It affects openssl and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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While parsing an IPAddressFamily extension in an X.509 certificate, it is possible to do a one-byte overread. This would result in an incorrect text display of the certificate. This bug has been present since 2006 and is present in all versions of OpenSSL before 1.0.2m and 1.1.0g.

CVSS: 5.3 MEDIUM (v3.0, NVD)CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Weakness (CWE): CWE-119
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	0.9.7j; 0.9.7k; 0.9.7l; 0.9.7m; 0.9.8; 0.9.8a; 0.9.8b; 0.9.8c; and 92 more ranges	NVD
debian debian_linux debian:debian_linux	8.0; 9.0	NVD

References

References

http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html
http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html
http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
http://www.securityfocus.com/bid/100515	third-party-advisory, vdb-entry
http://www.securitytracker.com/id/1039726	third-party-advisory, vdb-entry
https://access.redhat.com/errata/RHSA-2018:3221
https://access.redhat.com/errata/RHSA-2018:3505
https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
https://github.com/openssl/openssl/commit/068b963bb7afc57f5bdd723de0dd15e7795d5822
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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.