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SUSE libssh2_org Important DoS Issues Resolved with Update 2026-22364-1

suse
Calendar Grey July 1, 2026
Dist Suse Esm H88
Important security update for libssh2_org resolves two vulnerabilities in SUSE systems. Install recommended fixes now.
An update that solves two vulnerabilities can now be installed.

Summary

## This update for libssh2_org fixes the following issues * CVE-2026-55199: pre-Authentication DoS via SSH_MSG_EXT_INFO Handler (bsc#1268530). * CVE-2026-55200: out-of-Bounds write via Unchecked packet_length in transport.c (bsc#1268531). ## Patch Instructions: To install this SUSE update use the SUSE recommended installation methods like YaST online_update or "zypper patch". Alternatively you can run the command listed for your product: * SUSE Linux Enterprise Server 16.0 zypper in -t patch SUSE-SLES-16.0-1078=1 * SUSE Linux Enterprise Server for SAP applications 16.0 zypper in -t patch SUSE-SLES-16.0-1078=1 ## Package List: * SUSE Linux Enterprise Server 16.0 (aarch64 ppc64le s390x x86_64) * libssh2-1-debuginfo-1.11.1-160000.4.1 * libssh2-devel-1.11.1-160000.4.1

Topics%20covered

Topics Covered

security advisory SuSE DoS important out-of-bounds libssh2_org

References

* bsc#1268530

* bsc#1268531

Cross-

* CVE-2026-55199

* CVE-2026-55200

CVSS scores:

* CVE-2026-55199 ( SUSE ): 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

* CVE-2026-55199 ( NVD ): 8.2

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

* CVE-2026-55199 ( NVD ): 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

* CVE-2026-55199 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

* CVE-2026-55200 ( SUSE ): 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

* CVE-2026-55200 ( NVD ): 9.2

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:22364-1
Release Date: 2026-06-25T11:51:43Z
Rating: important

Topics%20covered

Topics Covered

security advisory SuSE DoS important out-of-bounds libssh2_org

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