RHSA-2026:85970 - Security Advisory

Topic

An update for openssl is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, as well as a full-strength general-purpose cryptography library.

Security Fix(es):

• openssl: heap buffer overflow in CMS key unwrapping (CVE-2026-63072)
• 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.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat Enterprise Linux for x86_64 - Extended Life Cycle Long Life 8.4 x86_64
• Red Hat Enterprise Linux Server - AUS 8.4 x86_64

Fixes

• BZ - 2517560 - CVE-2026-63072 openssl: heap buffer overflow in CMS key unwrapping
• BZ - 2537080 - CVE-2026-84782 openssl: compat-openssl: DTLS Retransmits Handshake Messages From a Stale Buffer Offset

CVEs

• CVE-2026-63072
• CVE-2026-84782

References

• https://access.redhat.com/security/updates/classification/#important