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).
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| OpenSSL | OpenSSL | Fixed in OpenSSL 3.0.3 (Affected 3.0.0,3.0.1,3.0.2) | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | openssl | 3.0.2-0ubuntu1.1 | USN-5402-1 |
| Ubuntu 20.04 LTS | openssl | 1.1.1f-1ubuntu2.13 | USN-5402-1 |
| Ubuntu 18.04 LTS | openssl | 1.1.1-1ubuntu2.1~18.04.17 | USN-5402-1 |
| Ubuntu 18.04 LTS | openssl1.0 | 1.0.2n-1ubuntu5.9 | USN-5402-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro FIPS 16.04 LTS | openssl | No fix yet | — |
| Ubuntu Pro FIPS-updates 16.04 LTS | openssl | 1.0.2g-1ubuntu4.fips.4.20.3 | — |
| Ubuntu Pro 16.04 LTS | edk2 | No fix yet | — |
| Ubuntu Pro 16.04 LTS | openssl | 1.0.2g-1ubuntu4.20+esm3 | USN-5402-2 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | openssl +3 | 1:3.0.1-41.el9_0 | RHSA-2022:6224 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | openssl +3 | 1:3.0.1-41.el9_0 | ALSA-2022:6224 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP4 | openssl-3 | 3.0.1-150400.4.7.1 | SUSE-SU-2022:2306-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | openssl-3 | 3.0.5-1.1 | openSUSE-SU-2024:12204-1 |
| openSUSE Leap 15.4 | openssl-3 | 3.0.1-150400.4.7.1 | SUSE-SU-2022:2306-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | openssl | 3.0.3-r0 | — |
| Alpine v3.23 | openssl | 3.0.3-r0 | — |
| Alpine v3.22 | openssl | 3.0.3-r0 | — |
| Alpine v3.21 | openssl | 3.0.3-r0 | — |
| Alpine v3.20 | openssl | 3.0.3-r0 | — |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | openssl | 3.0.3-r0 | — |
| Alpine v3.18 | openssl | 3.0.3-r0 | — |
| Alpine v3.17 | openssl | 3.0.3-r0 | — |
| Alpine v3.16 | openssl3 | 3.0.3-r0 | — |
| Alpine v3.15 | openssl3 | 3.0.3-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | openssl +3 | 1:3.0.5-1.amzn2023.0.4 | ALAS2023-2023-051 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | openssl +3 | 1:3.0.1-41.0.1.el9_0 | ELSA-2022-6224 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| crates.io | openssl-src | >= 300.0.0, < 300.0.6 | 300.0.6 | GHSA-g323-fr93-4j3c |
Advisories 20
- ALSA-2022:6224 Moderate: openssl security and bug fix update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2022:6224 Red Hat Security Advisory: openssl security and bug fix update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- SSA-398330 SSA-398330: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP >= V3.1.0 and < V3.1.5 Siemens ProductCERT · Oct 13, 2026
- SSA-794697 SSA-794697: Vulnerabilities in the Additional GNU/Linux Subsystem of the SIMATIC S7-1500 TM MFP Before V1.1 Siemens ProductCERT · Oct 13, 2026
- USN-5402-2 openssl vulnerabilities Ubuntu Security Notices (USN) · Jun 25, 2026
- USN-5402-1 openssl, openssl1.0 vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- WID-SEC-2022-0071 OpenSSL: Mehrere Schwachstellen BSI CERT-Bund (WID) · Feb 9, 2026
- openSUSE-SU-2024:12204-1 libopenssl-3-devel-3.0.5-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- ICSA-23-348-10 Siemens SIMATIC S7-1500 CISA ICS & IT advisories · Aug 12, 2025
- SUSE-SU-2022:2306-1 Security update for openssl-3 SUSE / openSUSE Security Updates · May 2, 2025
- ICSA-23-166-11 Siemens SIMATIC S7-1500 TM MFP Linux Kernel CISA ICS & IT advisories · Apr 9, 2024
- WID-SEC-2023-1432 Siemens SIMATIC S7: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 22, 2023
- SSA-942865 SSA-942865: Multiple Vulnerabilities in the Integrated SCALANCE S615 of SINAMICS Medium Voltage Products Siemens ProductCERT · Jun 14, 2023
- ICSA-23-166-12 Siemens SINAMICS Medium Voltage Products CISA ICS & IT advisories · Jun 14, 2023
- ICSA-23-075-01 Siemens SCALANCE, RUGGEDCOM Third-Party CISA ICS & IT advisories · Mar 14, 2023
- SSA-419740 SSA-419740: Multiple Third-Party Component Vulnerabilities in RUGGEDCOM and SCALANCE Products before V7.2 Siemens ProductCERT · Mar 14, 2023
- ALAS2023-2023-051 Important: openssl security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Feb 22, 2023
- ICSA-23-047-03 Siemens Brownfield Connectivity Client CISA ICS & IT advisories · Feb 14, 2023
- SSA-953464 SSA-953464: Multiple Vulnerabilites in Siemens Brownfield Connectivity - Client before V2.15 Siemens ProductCERT · Feb 14, 2023
- ELSA-2022-6224 Moderate: openssl security and bug fix update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Aug 30, 2022
References
- https://www.openssl.org/news/secadv/20220503.txt
- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=64c85430f95200b6b51fe9475bd5203f7c19daf1
- https://security.netapp.com/advisory/ntap-20220602-0009/
- GLSA-202210-02 vendor-advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-953464.pdf