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Vulnerability record · CVE-2022-1473 · published 3 May 2022

CVE-2022-1473: Openssl vulnerability

OOpenssl · Openssl

The OPENSSL_LH_flush() function, which empties a hash table, contains a bug that breaks reuse of the memory occuppied by the removed hash table entries. This function is used when decoding certificates or keys. If a long lived process periodically decodes certificates or keys its memory usage will expand without bounds and the process might be terminated by the operating system causing a denial of service. Also traversing the empty hash table entries will take increasingly more time. Typically such long lived processes might be TLS clients or TLS servers configured to accept client certificate authentication. The function was added in the OpenSSL 3.0 version thus older releases are not affected by the issue. Fixed in OpenSSL 3.0.3 (Affected 3.0.0,3.0.1,3.0.2).

7.5 CVSS 3.1 High EPSS 2.5% · top 15.8% CWE-459 · CWE-459
7.5CVSS 3.1 base score, v2 5.0
2.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
26Affected product versions listed by NVD
10References
17 Jun 2026Last modified by NVD

Description

The OPENSSL_LH_flush() function, which empties a hash table, contains a bug that breaks reuse of the memory occuppied by the removed hash table entries. This function is used when decoding certificates or keys. If a long lived process periodically decodes certificates or keys its memory usage will expand without bounds and the process might be terminated by the operating system causing a denial of service. Also traversing the empty hash table entries will take increasingly more time. Typically such long lived processes might be TLS clients or TLS servers configured to accept client certificate authentication. The function was added in the OpenSSL 3.0 version thus older releases are not affected by the issue. Fixed in OpenSSL 3.0.3 (Affected 3.0.0,3.0.1,3.0.2).

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

26 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://cert-portal.siemens.com/productcert/pdf/ssa-953464.pdf
https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=64c85430f95200b6b51fe9475bd5203f7c19daf1
https://security.gentoo.org/glsa/202210-02 Third Party Advisory
https://security.netapp.com/advisory/ntap-20220602-0009/ Third Party Advisory
https://www.openssl.org/news/secadv/20220503.txt Vendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-953464.pdf
https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=64c85430f95200b6b51fe9475bd5203f7c19daf1
https://security.gentoo.org/glsa/202210-02 Third Party Advisory
https://security.netapp.com/advisory/ntap-20220602-0009/ Third Party Advisory
https://www.openssl.org/news/secadv/20220503.txt Vendor Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2022-1473), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.