Security update for libssh

Announcement ID:	SUSE-SU-2026:1565-1
Release Date:	2026-04-23T07:08:39Z
Rating:	moderate
References:	bsc#1258045 bsc#1258049 bsc#1258054 bsc#1258080 bsc#1258081 bsc#1259377
Cross-References:	CVE-2026-0964 CVE-2026-0965 CVE-2026-0966 CVE-2026-0967 CVE-2026-0968 CVE-2026-3731
CVSS scores:	CVE-2026-0964 ( SUSE ): 5.0 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L CVE-2026-0964 ( NVD ): 5.0 CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L CVE-2026-0965 ( SUSE ): 3.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L CVE-2026-0965 ( NVD ): 3.3 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L CVE-2026-0966 ( SUSE ): 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L CVE-2026-0966 ( NVD ): 6.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L CVE-2026-0967 ( SUSE ): 1.0 CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N CVE-2026-0967 ( SUSE ): 2.2 CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:L CVE-2026-0967 ( NVD ): 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H CVE-2026-0967 ( NVD ): 2.2 CVSS:3.0/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:L CVE-2026-0968 ( SUSE ): 2.1 CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:P/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N CVE-2026-0968 ( SUSE ): 3.7 CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:L CVE-2026-0968 ( NVD ): 3.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L CVE-2026-0968 ( NVD ): 3.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L CVE-2026-0968 ( NVD ): 3.1 CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L 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 ): 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 ): 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 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

An update that solves six vulnerabilities can now be installed.

Description:

This update for libssh fixes the following issues:

• CVE-2026-0964: improper sanitation of paths received from SCP servers can cause path traversal (bsc#1258049).
• CVE-2026-0965: possible denial of service when parsing unexpected configuration files (bsc#1258045).
• CVE-2026-0966: buffer underflow in ssh_get_hexa() on invalid input (bsc#1258054).
• CVE-2026-0967: specially crafted patterns could cause denial of service (bsc#1258081).
• CVE-2026-0968: malformed SFTP message can lead to out of bound read (bsc#1258080).
• CVE-2026-3731: denial of service via out-of-bounds read in SFTP extension name handler (bsc#1259377).

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:

• openSUSE Leap 15.4
  zypper in -t patch SUSE-2026-1565=1
• SUSE Linux Enterprise Micro for Rancher 5.3
  zypper in -t patch SUSE-SLE-Micro-5.3-2026-1565=1
• SUSE Linux Enterprise Micro 5.3
  zypper in -t patch SUSE-SLE-Micro-5.3-2026-1565=1
• SUSE Linux Enterprise Micro for Rancher 5.4
  zypper in -t patch SUSE-SLE-Micro-5.4-2026-1565=1
• SUSE Linux Enterprise Micro 5.4
  zypper in -t patch SUSE-SLE-Micro-5.4-2026-1565=1
• SUSE Linux Enterprise Micro 5.5
  zypper in -t patch SUSE-SLE-Micro-5.5-2026-1565=1

Package List:

• openSUSE Leap 15.4 (aarch64 ppc64le s390x x86_64 i586)
  • libssh4-debuginfo-0.9.8-150400.3.17.1
  • libssh-config-0.9.8-150400.3.17.1
  • libssh4-0.9.8-150400.3.17.1
  • libssh-devel-0.9.8-150400.3.17.1
  • libssh-debugsource-0.9.8-150400.3.17.1
• openSUSE Leap 15.4 (x86_64)
  • libssh4-32bit-debuginfo-0.9.8-150400.3.17.1
  • libssh4-32bit-0.9.8-150400.3.17.1
• openSUSE Leap 15.4 (aarch64_ilp32)
  • libssh4-64bit-debuginfo-0.9.8-150400.3.17.1
  • libssh4-64bit-0.9.8-150400.3.17.1
• SUSE Linux Enterprise Micro for Rancher 5.3 (aarch64 s390x x86_64)
  • libssh4-debuginfo-0.9.8-150400.3.17.1
  • libssh-debugsource-0.9.8-150400.3.17.1
  • libssh-config-0.9.8-150400.3.17.1
  • libssh4-0.9.8-150400.3.17.1
• SUSE Linux Enterprise Micro 5.3 (aarch64 s390x x86_64)
  • libssh4-debuginfo-0.9.8-150400.3.17.1
  • libssh-debugsource-0.9.8-150400.3.17.1
  • libssh-config-0.9.8-150400.3.17.1
  • libssh4-0.9.8-150400.3.17.1
• SUSE Linux Enterprise Micro for Rancher 5.4 (aarch64 s390x x86_64)
  • libssh4-debuginfo-0.9.8-150400.3.17.1
  • libssh-debugsource-0.9.8-150400.3.17.1
  • libssh-config-0.9.8-150400.3.17.1
  • libssh4-0.9.8-150400.3.17.1
• SUSE Linux Enterprise Micro 5.4 (aarch64 s390x x86_64)
  • libssh4-debuginfo-0.9.8-150400.3.17.1
  • libssh-debugsource-0.9.8-150400.3.17.1
  • libssh-config-0.9.8-150400.3.17.1
  • libssh4-0.9.8-150400.3.17.1
• SUSE Linux Enterprise Micro 5.5 (aarch64 ppc64le s390x x86_64)
  • libssh4-debuginfo-0.9.8-150400.3.17.1
  • libssh-debugsource-0.9.8-150400.3.17.1
  • libssh-config-0.9.8-150400.3.17.1
  • libssh4-0.9.8-150400.3.17.1

References:

• https://www.suse.com/security/cve/CVE-2026-0964.html
• https://www.suse.com/security/cve/CVE-2026-0965.html
• https://www.suse.com/security/cve/CVE-2026-0966.html
• https://www.suse.com/security/cve/CVE-2026-0967.html
• https://www.suse.com/security/cve/CVE-2026-0968.html
• https://www.suse.com/security/cve/CVE-2026-3731.html
• https://bugzilla.suse.com/show_bug.cgi?id=1258045
• https://bugzilla.suse.com/show_bug.cgi?id=1258049
• https://bugzilla.suse.com/show_bug.cgi?id=1258054
• https://bugzilla.suse.com/show_bug.cgi?id=1258080
• https://bugzilla.suse.com/show_bug.cgi?id=1258081
• https://bugzilla.suse.com/show_bug.cgi?id=1259377