SUSE-SU-2026:3525-1: important: Security update for libssh2_org
SLE-SECURITY-UPDATES
null at suse.de
Fri Aug 7 20:36:43 UTC 2026
# Security update for libssh2_org
Announcement ID: SUSE-SU-2026:3525-1
Release Date: 2026-08-07T13:08:29Z
Rating: important
References:
* bsc#1263890
* bsc#1268530
* bsc#1268546
* bsc#1269567
* bsc#1269568
* bsc#1272734
* bsc#1272735
* bsc#1272736
* bsc#1272737
Cross-References:
* CVE-2025-15661
* CVE-2026-55199
* CVE-2026-58050
* CVE-2026-58051
* CVE-2026-66032
* CVE-2026-66033
* CVE-2026-66034
* CVE-2026-66035
* CVE-2026-7598
CVSS scores:
* CVE-2025-15661 ( SUSE ): 6.8 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:H
* CVE-2025-15661 ( NVD ): 8.3
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/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-2025-15661 ( NVD ): 6.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H
* CVE-2025-15661 ( NVD ): 6.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H
* 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 ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
* 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-2026-58050 ( SUSE ): 9.2
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
* CVE-2026-58050 ( SUSE ): 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
* CVE-2026-58050 ( NVD ): 8.3
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/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-2026-58050 ( NVD ): 7.0 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H
* CVE-2026-58050 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-58051 ( SUSE ): 8.3
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
* CVE-2026-58051 ( SUSE ): 6.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
* CVE-2026-58051 ( NVD ): 8.3
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/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-2026-58051 ( NVD ): 6.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
* CVE-2026-66032 ( SUSE ): 8.7
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
* CVE-2026-66032 ( SUSE ): 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
* CVE-2026-66032 ( NVD ): 8.7
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/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-2026-66032 ( NVD ): 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
* CVE-2026-66033 ( SUSE ): 8.7
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
* CVE-2026-66033 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-66033 ( NVD ): 8.7
CVSS:4.0/AV:N/AC:L/AT:N/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-2026-66033 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-66034 ( SUSE ): 7.7
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
* CVE-2026-66034 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
* CVE-2026-66034 ( NVD ): 7.7
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/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-2026-66034 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
* CVE-2026-66035 ( SUSE ): 7.7
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
* CVE-2026-66035 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
* CVE-2026-66035 ( NVD ): 7.7
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/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-2026-66035 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
* CVE-2026-7598 ( SUSE ): 6.9
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/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-2026-7598 ( SUSE ): 7.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
* CVE-2026-7598 ( NVD ): 6.9
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/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-2026-7598 ( NVD ): 7.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
* CVE-2026-7598 ( NVD ): 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Affected Products:
* SUSE Linux Enterprise High Performance Computing 12 SP5
* SUSE Linux Enterprise Server 12 SP5
* SUSE Linux Enterprise Server 12 SP5 LTSS
* SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security
* SUSE Linux Enterprise Server for SAP Applications 12 SP5
An update that solves nine vulnerabilities can now be installed.
## Description:
This update for libssh2_org fixes the following issues:
* CVE-2025-15661: out-of-bounds heap read vulnerability in the
`sftp_symlink()` function in `src/sftp.c` (bsc#1268546).
* CVE-2026-7598: integer overflow in function `userauth_password` of file
`src/userauth.c` (bsc#1263890).
* CVE-2026-55199: pre-authentication DoS via the `SSH_MSG_EXT_INFO` handler
(bsc#1268530).
* CVE-2026-58050: heap buffer overflow due to missing bounds check in
attribute count of publickey-subsystem response (bsc#1269568).
* CVE-2026-58051: uninitialized pointer freed when malformed responses are
sent by an SSH server (bsc#1269567).
* CVE-2026-66032: arbitrary code execution via double-free in SFTP session
(bsc#1272737).
* CVE-2026-66033: denial of service via integer underflow in AES-GCM cipher
negotiation (bsc#1272736).
* CVE-2026-66034: information disclosure and potential arbitrary code
execution via heap out-of-bounds read (bsc#1272735).
* CVE-2026-66035: arbitrary code execution via heap buffer overflow during SSH
negotiation (bsc#1272734).
## 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 12 SP5 LTSS Extended Security
zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-EXTENDED-SECURITY-2026-3525=1
* SUSE Linux Enterprise Server 12 SP5 LTSS
zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-2026-3525=1
## Package List:
* SUSE Linux Enterprise Server 12 SP5 LTSS (aarch64 ppc64le s390x x86_64)
* libssh2-1-debuginfo-1.11.0-29.18.1
* libssh2-devel-1.11.0-29.18.1
* libssh2-1-1.11.0-29.18.1
* libssh2_org-debugsource-1.11.0-29.18.1
* SUSE Linux Enterprise Server 12 SP5 LTSS (s390x x86_64)
* libssh2-1-debuginfo-32bit-1.11.0-29.18.1
* libssh2-1-32bit-1.11.0-29.18.1
* SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security (x86_64)
* libssh2-1-32bit-1.11.0-29.18.1
* libssh2-devel-1.11.0-29.18.1
* libssh2-1-debuginfo-1.11.0-29.18.1
* libssh2-1-debuginfo-32bit-1.11.0-29.18.1
* libssh2-1-1.11.0-29.18.1
* libssh2_org-debugsource-1.11.0-29.18.1
## References:
* https://www.suse.com/security/cve/CVE-2025-15661.html
* https://www.suse.com/security/cve/CVE-2026-55199.html
* https://www.suse.com/security/cve/CVE-2026-58050.html
* https://www.suse.com/security/cve/CVE-2026-58051.html
* https://www.suse.com/security/cve/CVE-2026-66032.html
* https://www.suse.com/security/cve/CVE-2026-66033.html
* https://www.suse.com/security/cve/CVE-2026-66034.html
* https://www.suse.com/security/cve/CVE-2026-66035.html
* https://www.suse.com/security/cve/CVE-2026-7598.html
* https://bugzilla.suse.com/show_bug.cgi?id=1263890
* https://bugzilla.suse.com/show_bug.cgi?id=1268530
* https://bugzilla.suse.com/show_bug.cgi?id=1268546
* https://bugzilla.suse.com/show_bug.cgi?id=1269567
* https://bugzilla.suse.com/show_bug.cgi?id=1269568
* https://bugzilla.suse.com/show_bug.cgi?id=1272734
* https://bugzilla.suse.com/show_bug.cgi?id=1272735
* https://bugzilla.suse.com/show_bug.cgi?id=1272736
* https://bugzilla.suse.com/show_bug.cgi?id=1272737
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