RHSA-2026:99725: 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_6.2 - Upgrade
Upgrade
redhat/compat-openssl10-debuginfoto a version that resolves this vulnerability.Fixed in 1.0.2o-4.el8_6.2 - Upgrade
Upgrade
redhat/compat-openssl10-debugsourceto a version that resolves this vulnerability.Fixed in 1.0.2o-4.el8_6.2
Event History
Frequently Asked Questions
Which systems need this update?
Systems with the Red Hat compat-openssl10 package installed are in scope, including the compat-openssl10-debuginfo and compat-openssl10-debugsource packages listed in the advisory. The compatibility package is intended for software that cannot be compiled against OpenSSL 1.1.
What protocol area is involved?
The listed fix concerns DTLS retransmission of handshake messages from a stale buffer offset. The advisory does not provide further exploitation prerequisites, affected configurations, or mitigation guidance.