SUSE-SU-2026:3463-1: moderate: Security update for libssh
SLE-SECURITY-UPDATES
null at suse.de
Mon Aug 3 20:32:44 UTC 2026
# Security update for libssh
Announcement ID: SUSE-SU-2026:3463-1
Release Date: 2026-08-03T12:18:59Z
Rating: moderate
References:
* bsc#1272164
* bsc#1272165
* bsc#1272166
* bsc#1272167
* bsc#1272168
* bsc#1272169
* bsc#1272171
Cross-References:
* CVE-2026-59843
* CVE-2026-59844
* CVE-2026-59845
* CVE-2026-59846
* CVE-2026-59847
* CVE-2026-59848
* CVE-2026-59850
CVSS scores:
* CVE-2026-59843 ( SUSE ): 7.1
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
* CVE-2026-59843 ( SUSE ): 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-59843 ( NVD ): 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-59844 ( SUSE ): 7.1
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
* CVE-2026-59844 ( SUSE ): 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-59844 ( NVD ): 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-59845 ( SUSE ): 8.2
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H
* CVE-2026-59845 ( SUSE ): 6.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
* CVE-2026-59845 ( NVD ): 5.3 CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:N/I:N/A:H
* CVE-2026-59845 ( NVD ): 5.9 CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:N/I:N/A:H
* CVE-2026-59846 ( SUSE ): 2.4
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
* CVE-2026-59846 ( SUSE ): 3.9 CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
* CVE-2026-59846 ( NVD ): 3.9 CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
* CVE-2026-59847 ( SUSE ): 8.3
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N
* CVE-2026-59847 ( SUSE ): 6.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L
* CVE-2026-59847 ( NVD ): 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
* CVE-2026-59847 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
* CVE-2026-59848 ( SUSE ): 6.3
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
* CVE-2026-59848 ( SUSE ): 3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
* CVE-2026-59848 ( NVD ): 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
* CVE-2026-59850 ( SUSE ): 5.3
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
* CVE-2026-59850 ( SUSE ): 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
* CVE-2026-59850 ( NVD ): 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
* CVE-2026-59850 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Products:
* openSUSE Leap 15.4
* 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
* SUSE Linux Enterprise High Performance Computing LTSS 15 SP4
* SUSE Linux Enterprise High Performance Computing LTSS 15 SP5
* SUSE Linux Enterprise Micro 5.3
* SUSE Linux Enterprise Micro 5.4
* SUSE Linux Enterprise Micro 5.5
* SUSE Linux Enterprise Micro for Rancher 5.3
* SUSE Linux Enterprise Micro for Rancher 5.4
* SUSE Linux Enterprise Server 15 SP4
* SUSE Linux Enterprise Server 15 SP4 LTSS
* SUSE Linux Enterprise Server 15 SP5
* SUSE Linux Enterprise Server 15 SP5 LTSS
* SUSE Linux Enterprise Server for SAP Applications 15 SP4
* SUSE Linux Enterprise Server for SAP Applications 15 SP5
An update that solves seven vulnerabilities can now be installed.
## Description:
This update for libssh fixes the following issues:
* CVE-2026-59843: denial of service via zero advertised channel packet size
(bsc#1272164).
* CVE-2026-59844: denial of service via oversized SFTP read length
(bsc#1272165).
* CVE-2026-59845: denial of service via unchecked ProxyCommand fork() failure
(bsc#1272166).
* CVE-2026-59846: information disclosure via ProxyCommand %r username
expansion (bsc#1272167).
* CVE-2026-59847: integrity downgrade via OpenSSL AES-GCM tag verification
(bsc#1272168).
* CVE-2026-59848: denial of service via SFTP responses with unknown request
IDs (bsc#1272169).
* CVE-2026-59850: use-after-free via data callbacks on closed channels
(bsc#1272171).
## 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 LTSS 15 SP5
zypper in -t patch SUSE-SLE-Product-HPC-15-SP5-LTSS-2026-3463=1
* SUSE Linux Enterprise Server 15 SP5 LTSS
zypper in -t patch SUSE-SLE-Product-SLES-15-SP5-LTSS-2026-3463=1
* SUSE Linux Enterprise Micro 5.5
zypper in -t patch SUSE-SLE-Micro-5.5-2026-3463=1
* SUSE Linux Enterprise Server for SAP Applications 15 SP4
zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP4-2026-3463=1
* SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5
zypper in -t patch SUSE-SLE-Product-HPC-15-SP5-ESPOS-2026-3463=1
* SUSE Linux Enterprise Server 15 SP4 LTSS
zypper in -t patch SUSE-SLE-Product-SLES-15-SP4-LTSS-2026-3463=1
* SUSE Linux Enterprise High Performance Computing LTSS 15 SP4
zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-LTSS-2026-3463=1
* SUSE Linux Enterprise Micro for Rancher 5.3
zypper in -t patch SUSE-SLE-Micro-5.3-2026-3463=1
* SUSE Linux Enterprise Micro 5.3
zypper in -t patch SUSE-SLE-Micro-5.3-2026-3463=1
* SUSE Linux Enterprise Server for SAP Applications 15 SP5
zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP5-2026-3463=1
* SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4
zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-ESPOS-2026-3463=1
* SUSE Linux Enterprise Micro for Rancher 5.4
zypper in -t patch SUSE-SLE-Micro-5.4-2026-3463=1
* SUSE Linux Enterprise Micro 5.4
zypper in -t patch SUSE-SLE-Micro-5.4-2026-3463=1
* openSUSE Leap 15.4
zypper in -t patch SUSE-2026-3463=1
## Package List:
* SUSE Linux Enterprise Server for SAP Applications 15 SP5 (ppc64le x86_64)
* libssh-devel-0.9.8-150400.3.20.1
* libssh-config-0.9.8-150400.3.20.1
* libssh-debugsource-0.9.8-150400.3.20.1
* libssh4-debuginfo-0.9.8-150400.3.20.1
* libssh4-0.9.8-150400.3.20.1
* SUSE Linux Enterprise Server for SAP Applications 15 SP5 (x86_64)
* libssh4-32bit-debuginfo-0.9.8-150400.3.20.1
* libssh4-32bit-0.9.8-150400.3.20.1
* SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4 (aarch64
x86_64)
* libssh-devel-0.9.8-150400.3.20.1
* libssh4-0.9.8-150400.3.20.1
* libssh-config-0.9.8-150400.3.20.1
* libssh4-debuginfo-0.9.8-150400.3.20.1
* libssh-debugsource-0.9.8-150400.3.20.1
* SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4 (x86_64)
* libssh4-32bit-debuginfo-0.9.8-150400.3.20.1
* libssh4-32bit-0.9.8-150400.3.20.1
* openSUSE Leap 15.4 (aarch64 i586 ppc64le s390x x86_64)
* libssh-devel-0.9.8-150400.3.20.1
* libssh-config-0.9.8-150400.3.20.1
* libssh-debugsource-0.9.8-150400.3.20.1
* libssh4-debuginfo-0.9.8-150400.3.20.1
* libssh4-0.9.8-150400.3.20.1
* openSUSE Leap 15.4 (x86_64)
* libssh4-32bit-debuginfo-0.9.8-150400.3.20.1
* libssh4-32bit-0.9.8-150400.3.20.1
* openSUSE Leap 15.4 (aarch64_ilp32)
* libssh4-64bit-debuginfo-0.9.8-150400.3.20.1
* libssh4-64bit-0.9.8-150400.3.20.1
* SUSE Linux Enterprise Server 15 SP4 LTSS (aarch64 ppc64le s390x x86_64)
* libssh-devel-0.9.8-150400.3.20.1
* libssh4-0.9.8-150400.3.20.1
* libssh-config-0.9.8-150400.3.20.1
* libssh4-debuginfo-0.9.8-150400.3.20.1
* libssh-debugsource-0.9.8-150400.3.20.1
* SUSE Linux Enterprise Server 15 SP4 LTSS (x86_64)
* libssh4-32bit-debuginfo-0.9.8-150400.3.20.1
* libssh4-32bit-0.9.8-150400.3.20.1
* SUSE Linux Enterprise Server 15 SP5 LTSS (aarch64 ppc64le s390x x86_64)
* libssh-devel-0.9.8-150400.3.20.1
* libssh4-0.9.8-150400.3.20.1
* libssh-config-0.9.8-150400.3.20.1
* libssh4-debuginfo-0.9.8-150400.3.20.1
* libssh-debugsource-0.9.8-150400.3.20.1
* SUSE Linux Enterprise Server 15 SP5 LTSS (x86_64)
* libssh4-32bit-debuginfo-0.9.8-150400.3.20.1
* libssh4-32bit-0.9.8-150400.3.20.1
* SUSE Linux Enterprise Micro for Rancher 5.4 (aarch64 s390x x86_64)
* libssh-config-0.9.8-150400.3.20.1
* libssh4-debuginfo-0.9.8-150400.3.20.1
* libssh-debugsource-0.9.8-150400.3.20.1
* libssh4-0.9.8-150400.3.20.1
* SUSE Linux Enterprise Micro 5.4 (aarch64 s390x x86_64)
* libssh-config-0.9.8-150400.3.20.1
* libssh4-debuginfo-0.9.8-150400.3.20.1
* libssh-debugsource-0.9.8-150400.3.20.1
* libssh4-0.9.8-150400.3.20.1
* SUSE Linux Enterprise Server for SAP Applications 15 SP4 (ppc64le x86_64)
* libssh-devel-0.9.8-150400.3.20.1
* libssh4-0.9.8-150400.3.20.1
* libssh-config-0.9.8-150400.3.20.1
* libssh4-debuginfo-0.9.8-150400.3.20.1
* libssh-debugsource-0.9.8-150400.3.20.1
* SUSE Linux Enterprise Server for SAP Applications 15 SP4 (x86_64)
* libssh4-32bit-debuginfo-0.9.8-150400.3.20.1
* libssh4-32bit-0.9.8-150400.3.20.1
* SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5 (aarch64
x86_64)
* libssh-devel-0.9.8-150400.3.20.1
* libssh4-0.9.8-150400.3.20.1
* libssh-config-0.9.8-150400.3.20.1
* libssh4-debuginfo-0.9.8-150400.3.20.1
* libssh-debugsource-0.9.8-150400.3.20.1
* SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5 (x86_64)
* libssh4-32bit-debuginfo-0.9.8-150400.3.20.1
* libssh4-32bit-0.9.8-150400.3.20.1
* SUSE Linux Enterprise High Performance Computing LTSS 15 SP5 (aarch64
x86_64)
* libssh-devel-0.9.8-150400.3.20.1
* libssh4-0.9.8-150400.3.20.1
* libssh-config-0.9.8-150400.3.20.1
* libssh4-debuginfo-0.9.8-150400.3.20.1
* libssh-debugsource-0.9.8-150400.3.20.1
* SUSE Linux Enterprise High Performance Computing LTSS 15 SP5 (x86_64)
* libssh4-32bit-debuginfo-0.9.8-150400.3.20.1
* libssh4-32bit-0.9.8-150400.3.20.1
* SUSE Linux Enterprise High Performance Computing LTSS 15 SP4 (aarch64
x86_64)
* libssh-devel-0.9.8-150400.3.20.1
* libssh-config-0.9.8-150400.3.20.1
* libssh-debugsource-0.9.8-150400.3.20.1
* libssh4-debuginfo-0.9.8-150400.3.20.1
* libssh4-0.9.8-150400.3.20.1
* SUSE Linux Enterprise High Performance Computing LTSS 15 SP4 (x86_64)
* libssh4-32bit-debuginfo-0.9.8-150400.3.20.1
* libssh4-32bit-0.9.8-150400.3.20.1
* SUSE Linux Enterprise Micro 5.5 (aarch64 ppc64le s390x x86_64)
* libssh-config-0.9.8-150400.3.20.1
* libssh-debugsource-0.9.8-150400.3.20.1
* libssh4-debuginfo-0.9.8-150400.3.20.1
* libssh4-0.9.8-150400.3.20.1
* SUSE Linux Enterprise Micro for Rancher 5.3 (aarch64 s390x x86_64)
* libssh-config-0.9.8-150400.3.20.1
* libssh-debugsource-0.9.8-150400.3.20.1
* libssh4-debuginfo-0.9.8-150400.3.20.1
* libssh4-0.9.8-150400.3.20.1
* SUSE Linux Enterprise Micro 5.3 (aarch64 s390x x86_64)
* libssh-config-0.9.8-150400.3.20.1
* libssh-debugsource-0.9.8-150400.3.20.1
* libssh4-debuginfo-0.9.8-150400.3.20.1
* libssh4-0.9.8-150400.3.20.1
## References:
* https://www.suse.com/security/cve/CVE-2026-59843.html
* https://www.suse.com/security/cve/CVE-2026-59844.html
* https://www.suse.com/security/cve/CVE-2026-59845.html
* https://www.suse.com/security/cve/CVE-2026-59846.html
* https://www.suse.com/security/cve/CVE-2026-59847.html
* https://www.suse.com/security/cve/CVE-2026-59848.html
* https://www.suse.com/security/cve/CVE-2026-59850.html
* https://bugzilla.suse.com/show_bug.cgi?id=1272164
* https://bugzilla.suse.com/show_bug.cgi?id=1272165
* https://bugzilla.suse.com/show_bug.cgi?id=1272166
* https://bugzilla.suse.com/show_bug.cgi?id=1272167
* https://bugzilla.suse.com/show_bug.cgi?id=1272168
* https://bugzilla.suse.com/show_bug.cgi?id=1272169
* https://bugzilla.suse.com/show_bug.cgi?id=1272171
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