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SUSE libssh2_org Moderate DoS Issue Vulnern 2026-3074-1

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Calendar Grey July 16, 2026
Scroller Suse
SUSE releases a moderate security advisory addressing a CVE-2026-55199 DoS issue in libssh2_org, urging updates promptly.
SUSE released a security update for libssh2_org to address a pre-Authentication DoS vulnerability (CVE-2026-55199) alongside various package rebuilds to support ed25519.

Summary

## This update for libssh2_org fixes the following issue Security changes: * CVE-2026-55199: pre-Authentication DoS via SSH_MSG_EXT_INFO Handler (bsc#1268530). Other changes: * rebuild libssh2_org against openssl 1.1.1, enabling ed25519 support. (bsc#1227490) ## 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 High Performance Computing ESPOS 15 SP4 zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-ESPOS-2026-3074=1 * SUSE Linux Enterprise Server for SAP Applications 15 SP4 zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP4-2026-3074=1 * SUSE Linux Enterprise Micro for Rancher 5.3

Topics%20covered

Topics Covered

security advisory moderate SuSE DoS libssh2_org CVE-2026-55199

References

* bsc#1227490

* bsc#1268530

Cross-

* CVE-2026-55199

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

Affected Products:

* SUSE Linux Enterprise High Performance Computing 15 SP4

* SUSE Linux Enterprise High Performance Computing 15 SP5

* SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4

* SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5

Severity
moderate
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:3074-1
Release Date: 2026-07-16T09:59:26Z
Rating: moderate

Topics%20covered

Topics Covered

security advisory moderate SuSE DoS libssh2_org CVE-2026-55199

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