Issued at: 2026-09-15
Updated at: 2026-09-16
Advisory content derived from Red Hat RHSA-2026:67165, © Red Hat, Inc., used under CC BY 4.0, with modifications.
Synopsis
Important: openssl security, bug fix, and enhancement update
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: OpenSSL: Denial of Service via unbounded memory growth in QUIC server (CVE-2026-14456)
* openssl: QUIC server may trigger double free when processing INITIAL packet (CVE-2026-18798)
* openssl: heap buffer overflow in CMS key unwrapping (CVE-2026-63072)
* openssl: invalid pointer dereference in CMP server via crafted protectionAlg (CVE-2026-63076)
* openssl: RPK server signature algorithm selection can dereference a missing certificate (CVE-2026-14457)
* openssl: excessive memory use buffering DTLS records for a future epoch (CVE-2026-54874)
* openssl: untrusted sender DN used as format string in CMP response validation (CVE-2026-63073)
* openssl: CMP indefinite cache growth of ExtraCerts (CVE-2026-63074)
* openssl: QUIC ACK-only packet retention can cause memory exhaustion (CVE-2026-63075)
Bug Fix(es) and Enhancement(s):
* openssl: HollowByte remote memory-exhaustion DoS fix may be missing [Rocky Linux 9.8.z] (JIRA:Rocky Linux-232828)
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.