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SUSE 16.0 OpenSSL-3 Important Seven Vulnerability Fix 2026-21186-1

suse
Calendar Grey April 21, 2026
Dist Suse Esm H88
Critical update for openssl-3 in SUSE addressing seven vulnerabilities with important patches. Install promptly for security.
An update that solves seven vulnerabilities and contains one feature can now be installed.

Summary

## This update for openssl-3 fixes the following issues: Security issues fixed: * CVE-2026-2673: TLS 1.3 servers may choose unexpected key agreement group (bsc#1259652). * CVE-2026-28387: potential use-after-free in DANE client code (bsc#1260441). * CVE-2026-28388: NULL pointer dereference when processing a delta (bsc#1260442). * CVE-2026-28389: possible NULL pointer dereference when processing CMS KeyAgreeRecipientInfo (bsc#1260443). * CVE-2026-28390: NULL pointer dereference during processing of a crafted CMS EnvelopedData message with KeyTransportRecipientInfo (bsc#1261678). * CVE-2026-31789: heap buffer overflow in hexadecimal conversion (bsc#1260444). * CVE-2026-31790: incorrect failure handling in RSA KEM RSASVE encapsulation (bsc#1260445). Other updates and bugfixes:

Topics%20covered

Topics Covered

security advisory security issue buffer overflow SuSE important openssl-3

References

* bsc#1259652

* bsc#1260441

* bsc#1260442

* bsc#1260443

* bsc#1260444

* bsc#1260445

* bsc#1261678

* jsc#PED-15724

Cross-

* CVE-2026-2673

* CVE-2026-28387

* CVE-2026-28388

* CVE-2026-28389

* CVE-2026-28390

* CVE-2026-31789

* CVE-2026-31790

CVSS scores:

* CVE-2026-2673 ( SUSE ): 6.3

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

* CVE-2026-2673 ( SUSE ): 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

* CVE-2026-2673 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

* CVE-2026-28387 ( SUSE ): 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

* CVE-2026-28388 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

* CVE-2026-28389 ( SUSE ): 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:21186-1
Release Date: 2026-04-13T15:48:00Z
Rating: important

Topics%20covered

Topics Covered

security advisory security issue buffer overflow SuSE important openssl-3

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