High 7.5Published May 4, 2017

CVE-2017-3731If an SSL/TLS server or client is running on a 32-bit host, and a specific cipher is being used, then a truncated packet can cause that server or client to perform an out-of-bounds read, usually resu…

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

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No exploitation reported and no EPSS estimate yet.

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If an SSL/TLS server or client is running on a 32-bit host, and a specific cipher is being used, then a truncated packet can cause that server or client to perform an out-of-bounds read, usually resulting in a crash. For OpenSSL 1.1.0, the crash can be triggered when using CHACHA20/POLY1305; users should upgrade to 1.1.0d. For Openssl 1.0.2, the crash can be triggered when using RC4-MD5; users who have not disabled that algorithm should update to 1.0.2k.

CVSS: 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-125
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	1.1.0a; 1.1.0b; 1.1.0c; 1.0.2; 1.0.2; 1.0.2; 1.0.2; 1.0.2a; and 8 more ranges	NVD
nodejs node.js nodejs:node.js	from 4.0.0 through 4.1.2; from 4.2.0 before 4.7.3; from 5.0.0 through 5.12.0; from 6.0.0 through 6.8.1; from 6.9.0 before 6.9.5; from 7.0.0 before 7.5.0	NVD

References

References

http://rhn.redhat.com/errata/RHSA-2017-0286.html	third-party-advisory
http://www.debian.org/security/2017/dsa-3773	third-party-advisory
http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html	patch, third-party-advisory
http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html	patch, third-party-advisory
http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html	patch, third-party-advisory
http://www.securityfocus.com/bid/95813	third-party-advisory, vdb-entry
http://www.securitytracker.com/id/1037717	third-party-advisory, vdb-entry
https://access.redhat.com/errata/RHSA-2018:2185	third-party-advisory
https://access.redhat.com/errata/RHSA-2018:2186	third-party-advisory
https://access.redhat.com/errata/RHSA-2018:2187	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.