RHSA-2026:99724: Important: compat-openssl10 security update
The OpenSSL toolkit provides support for secure communications between machines. This version of OpenSSL package contains only the libraries and is provided for compatibility with previous releases and software that does not support compilation with OpenSSL-1.1.Security Fix(es): openssl: compat-openssl: DTLS Retransmits Handshake Messages From a Stale Buffer Offset (CVE-2026-84782) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
redhat/compat-openssl10to a version that resolves this vulnerability.Fixed in 1.0.2o-4.el8_8.2 - Upgrade
Upgrade
redhat/compat-openssl10-debuginfoto a version that resolves this vulnerability.Fixed in 1.0.2o-4.el8_8.2 - Upgrade
Upgrade
redhat/compat-openssl10-debugsourceto a version that resolves this vulnerability.Fixed in 1.0.2o-4.el8_8.2
Event History
Frequently Asked Questions
Which deployments should be prioritized for review?
Review systems with compat-openssl10, compat-openssl10-debuginfo, or compat-openssl10-debugsource installed, particularly where software depends on the compatibility libraries because it cannot be compiled with OpenSSL 1.1.
Does the advisory identify a required attacker capability or affected default configuration?
No. The available advisory data identifies the issue as a DTLS handshake retransmission problem but does not state attacker prerequisites, affected configurations, or whether default configurations are vulnerable.