Mehrere Probleme in libssh (SUSE)

Дата публикации: 30-07-2026 16:22:36

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# Security update for libssh

Announcement ID: SUSE-SU-2026:3302-1
Release Date: 2026-07-27T17:09:32Z
Rating: moderate
References:

* bsc#1259377
* bsc#1272164
* bsc#1272165
* bsc#1272166
* bsc#1272167
* bsc#1272168
* bsc#1272169
* bsc#1272171

Cross-References:

* CVE-2026-3731
* CVE-2026-59843
* CVE-2026-59844
* CVE-2026-59845
* CVE-2026-59846
* CVE-2026-59847
* CVE-2026-59848
* CVE-2026-59850

CVSS scores:

* CVE-2026-3731 ( SUSE ): 6.9
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
* CVE-2026-3731 ( SUSE ): 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
* CVE-2026-3731 ( NVD ): 6.9

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/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-2026-3731 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-3731 ( NVD ): 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
* 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-2026-59846 ( 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-2026-59848 ( 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

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 eight vulnerabilities can now be installed.

## Description:

This update for libssh fixes the following issues:

* CVE-2026-3731: denial of service via out-of-bounds read in SFTP extension
name handler (bsc#1259377).
* 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 Server 12 SP5 LTSS Extended Security
zypper in -t patch
SUSE-SLE-SERVER-12-SP5-LTSS-EXTENDED-SECURITY-2026-3302=1

* SUSE Linux Enterprise Server 12 SP5 LTSS
zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-2026-3302=1

## Package List:

* SUSE Linux Enterprise Server 12 SP5 LTSS (aarch64 ppc64le s390x x86_64)
* libssh4-debuginfo-0.9.8-3.24.1
* libssh-config-0.9.8-3.24.1
* libssh-devel-0.9.8-3.24.1
* libssh-debugsource-0.9.8-3.24.1
* libssh4-0.9.8-3.24.1
* SUSE Linux Enterprise Server 12 SP5 LTSS (s390x x86_64)
* libssh4-32bit-0.9.8-3.24.1
* libssh4-debuginfo-32bit-0.9.8-3.24.1
* SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security (x86_64)
* libssh4-debuginfo-0.9.8-3.24.1
* libssh4-32bit-0.9.8-3.24.1
* libssh-config-0.9.8-3.24.1
* libssh-devel-0.9.8-3.24.1
* libssh4-debuginfo-32bit-0.9.8-3.24.1
* libssh-debugsource-0.9.8-3.24.1
* libssh4-0.9.8-3.24.1

## References:

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<div class="container">
<h1>Security update for libssh</h1>

<table class="table table-striped table-bordered">
<tbody>
<tr>
<th>Announcement ID:</th>
<td>SUSE-SU-2026:3302-1</td>
</tr>
<tr>
<th>Release Date:</th>
<td>2026-07-27T17:09:32Z</td>
</tr>

<tr>
<th>Rating:</th>
<td>moderate</td>
</tr>
<tr>
<th>References:</th>
<td>
<ul>

</ul>
</td>
</tr>

<tr>
<th>
Cross-References:
</th>
<td>
<ul>

</ul>
</td>
</tr>
<tr>
<th>CVSS scores:</th>
<td>
<ul class="list-group">