RLSA-2026:67165: openssl security update

RLSA-2026:67165, released September 15, 2026, fixes 9 CVEs in openssl (version 1:3.5.8-1.el9_8). None of them is reported as exploited. Patch Radar priority: High.

High

CVEs closed

None rated Critical

Exploited

None reported

Highest CVSS

9.8

Base score, 0 to 10

Highest EPSS

0.0170

77th percentile

Priority of the 9 CVEs

Patch now 0
                                Urgent 0
                                High 9
                                Routine 0

Fixed package versions

Product	Release	Fixed in
openssl	rocky 9	1:3.5.8-1.el9_8

CVEs this fix closes

Priority	CVE	Title	CVSS	EPSS	Exploitation
High	CVE-2026-18798	openssl: Issue summary: QUIC server may double free QRX (QUIC record layer RX) object when channel creation fails for initial...	7.5	0.0170	None reported
High	CVE-2026-63076	Invalid Pointer Dereference in CMP Server via Crafted protectionAlg	7.5	0.0160	None reported
High	CVE-2026-14457	RPK Server Signature Algorithm Selection Can Dereference a Missing Certificate	7.5	0.0117	None reported
High	CVE-2026-63073	Untrusted Sender DN Used as Format String in CMP Response Validation	9.8	0.0116	None reported
High	CVE-2026-63072	Heap Buffer Overflow in CMS Key Unwrapping	7.5	0.0092	None reported
High	CVE-2026-14456	Unbounded Memory Growth in QUIC Server Incoming Channel Queue	7.5	0.0073	None reported
High	CVE-2026-54874	Excessive Memory Use Buffering DTLS Records for a Future Epoch	7.5	0.0062	None reported
High	CVE-2026-63074	CMP Indefinite Cache Growth of ExtraCerts	7.5	0.0059	None reported
High	CVE-2026-63075	QUIC ACK-only Packet Retention Can Cause Memory Exhaustion	7.5	0.0057	None reported

Also fixes CVE-2026-18798

SUSE-SU-2026:4039-1
openssl-3 on sles 15.7
SUSE-SU-2026:23609-1
openssl-3 on sles 16.0
OPENSUSE-SU-2026:21744-1
openssl-3 on opensuse-leap 16.0
RHSA-2026:67165
openssl, openssl-devel, openssl-libs and 1 more on RHEL 9
ALSA-2026:67165
openssl, openssl-devel, openssl-libs and 1 more on almalinux 9
ALAS2023-2026-2136
openssl, openssl-debuginfo, openssl-debugsource and 8 more on amzn 2023
RLSA-2026:67154
openssl on rocky 10
RHSA-2026:67154
openssl on RHEL 10

Vendor advisory

https://errata.rockylinux.org/RLSA-2026:67165

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