High 7.5Published Nov 1, 2022

CVE-2022-3602A buffer overrun can be triggered in X.509 certificate verification, specifically in name constraint checking.

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 buffer overrun can be triggered in X.509 certificate verification, specifically in name constraint checking. Note that this occurs after certificate chain signature verification and requires either a CA to have signed the malicious certificate or for the application to continue certificate verification despite failure to construct a path to a trusted issuer. An attacker can craft a malicious email address to overflow four attacker-controlled bytes on the stack. This buffer overflow could result in a crash (causing a denial of service) or potentially remote code execution. Many platforms implement stack overflow protections which would mitigate against the risk of remote code execution. The risk may be further mitigated based on stack layout for any given platform/compiler. Pre-announcements of CVE-2022-3602 described this issue as CRITICAL. Further analysis based on some of the mitigating factors described above have led this to be downgraded to HIGH. Users are still encouraged to upgrade to a new version as soon as possible. In a TLS client, this can be triggered by connecting to a malicious server. In a TLS server, this can be triggered if the server requests client authentication and a malicious client connects. Fixed in OpenSSL 3.0.7 (Affected 3.0.0,3.0.1,3.0.2,3.0.3,3.0.4,3.0.5,3.0.6).

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-787
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 17, 2026
First seen by InfoSec Signals: Nov 1, 2026

Affected products

Affected products

openssl openssl openssl:openssl	from 3.0.0 before 3.0.7	NVD
fedoraproject fedora fedoraproject:fedora	36; 37; 26; 27	NVD
netapp clustered_data_ontap netapp:clustered_data_ontap	all versions	NVD
nodejs node.js nodejs:node.js	from 18.0.0 before 18.11.0; 18.12.0; 19.0.0	NVD

References

References

http://packetstormsecurity.com/files/169687/OpenSSL-Security-Advisory-20221101.html	third-party-advisory, vdb-entry
http://www.openwall.com/lists/oss-security/2022/11/01/15	mailing-list, third-party-advisory
http://www.openwall.com/lists/oss-security/2022/11/01/16	mailing-list, third-party-advisory
http://www.openwall.com/lists/oss-security/2022/11/01/17	mailing-list, third-party-advisory
http://www.openwall.com/lists/oss-security/2022/11/01/18	mailing-list, third-party-advisory
http://www.openwall.com/lists/oss-security/2022/11/01/19	mailing-list, third-party-advisory
http://www.openwall.com/lists/oss-security/2022/11/01/20	mailing-list, third-party-advisory
http://www.openwall.com/lists/oss-security/2022/11/01/21	mailing-list, third-party-advisory
http://www.openwall.com/lists/oss-security/2022/11/01/24	mailing-list, third-party-advisory
http://www.openwall.com/lists/oss-security/2022/11/02/1	mailing-list, 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.