Security update for samba

Announcement ID:	SUSE-SU-2026:2076-1
Release Date:	2026-05-26T12:36:52Z
Rating:	critical
References:	bsc#1255755 bsc#1257200 bsc#1259441 bsc#1261158 bsc#1261159 bsc#1261160 bsc#1261161 bsc#1261163 bsc#1261188
Cross-References:	CVE-2026-1933 CVE-2026-2340 CVE-2026-3012 CVE-2026-3238 CVE-2026-4408 CVE-2026-4480
CVSS scores:	CVE-2026-1933 ( SUSE ): 7.1 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N CVE-2026-1933 ( SUSE ): 7.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H CVE-2026-2340 ( SUSE ): 7.1 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N CVE-2026-2340 ( SUSE ): 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N CVE-2026-3012 ( SUSE ): 7.6 CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N CVE-2026-3012 ( SUSE ): 8.0 CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N CVE-2026-3238 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVE-2026-4408 ( SUSE ): 9.4 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H CVE-2026-4408 ( SUSE ): 9.9 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H CVE-2026-4480 ( SUSE ): 10.0 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H CVE-2026-4480 ( SUSE ): 10.0 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H CVE-2026-4480 ( NVD ): 8.5 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Affected Products:	Basesystem Module 15-SP7 SUSE Linux Enterprise Desktop 15 SP7 SUSE Linux Enterprise High Availability Extension 15 SP7 SUSE Linux Enterprise Real Time 15 SP7 SUSE Linux Enterprise Server 15 SP7 SUSE Linux Enterprise Server for SAP Applications 15 SP7

An update that solves six vulnerabilities and has three security fixes can now be installed.

Description:

This update for samba fixes the following issues

Security issues:

• CVE-2026-1933: Missing access check on reparse point operations (bsc#1261188).
• CVE-2026-2340: vfs_worm does not block directory modification (bsc#1261158).
• CVE-2026-3012: group policy certificate enrollment uses http: // without validation (bsc#1261159).
• CVE-2026-3238: unauthenticated udp packet crashes AD DC nbt server (bsc#1261160).
• CVE-2026-4408: Remote Code Execution in SAMR (bsc#1261163).
• CVE-2026-4480: Unauthenticated Remote Code Execution (bsc#1261161).

Non security issue:

• network:samba:STABLE/samba: "use-kerberos=desired" broken / Dolphin requires login for Samba shares (bsc#1255755).
• Generated dynamic profile based on path to special 'printers' share. (bsc#1259441).
• Fix regression "use-kerberos=desired" broken doesn't even try to authenticate with kerberos and instead fallsback to NTLM (bsc#1255755).
• Fix memory leak using cups parsed options and filename allocated when processing end of printing job (bsc#1257200).
• Fix manpage for "net offlinejoin requestodj".
• Fix "ctdbd socket" documentation in manpage for smb.conf
• Fix rpc workers with long living clients from growing server memory keytab and increasing memory used by workers (bsc#1257200).

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:

• Basesystem Module 15-SP7
  zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP7-2026-2076=1
• SUSE Linux Enterprise High Availability Extension 15 SP7
  zypper in -t patch SUSE-SLE-Product-HA-15-SP7-2026-2076=1

Package List:

• Basesystem Module 15-SP7 (aarch64 ppc64le s390x x86_64)
  • samba-winbind-debuginfo-4.21.10+git.501.277ba349a01-150700.3.26.1
  • samba-libs-4.21.10+git.501.277ba349a01-150700.3.26.1
  • samba-dcerpc-debuginfo-4.21.10+git.501.277ba349a01-150700.3.26.1
  • samba-client-debuginfo-4.21.10+git.501.277ba349a01-150700.3.26.1
  • samba-dcerpc-4.21.10+git.501.277ba349a01-150700.3.26.1
  • samba-winbind-libs-4.21.10+git.501.277ba349a01-150700.3.26.1
  • samba-client-libs-debuginfo-4.21.10+git.501.277ba349a01-150700.3.26.1
  • python3-ldb-debuginfo-4.21.10+git.501.277ba349a01-150700.3.26.1
  • samba-tool-4.21.10+git.501.277ba349a01-150700.3.26.1
  • samba-client-libs-4.21.10+git.501.277ba349a01-150700.3.26.1
  • libldb-devel-4.21.10+git.501.277ba349a01-150700.3.26.1
  • samba-debuginfo-4.21.10+git.501.277ba349a01-150700.3.26.1
  • samba-gpupdate-4.21.10+git.501.277ba349a01-150700.3.26.1
  • samba-libs-debuginfo-4.21.10+git.501.277ba349a01-150700.3.26.1
  • samba-debugsource-4.21.10+git.501.277ba349a01-150700.3.26.1
  • samba-libs-python3-4.21.10+git.501.277ba349a01-150700.3.26.1
  • samba-libs-python3-debuginfo-4.21.10+git.501.277ba349a01-150700.3.26.1
  • samba-winbind-libs-debuginfo-4.21.10+git.501.277ba349a01-150700.3.26.1
  • samba-devel-4.21.10+git.501.277ba349a01-150700.3.26.1
  • ldb-tools-4.21.10+git.501.277ba349a01-150700.3.26.1
  • samba-python3-debuginfo-4.21.10+git.501.277ba349a01-150700.3.26.1
  • samba-ldb-ldap-4.21.10+git.501.277ba349a01-150700.3.26.1
  • samba-ldb-ldap-debuginfo-4.21.10+git.501.277ba349a01-150700.3.26.1
  • ldb-tools-debuginfo-4.21.10+git.501.277ba349a01-150700.3.26.1
  • samba-client-4.21.10+git.501.277ba349a01-150700.3.26.1
  • libldb2-4.21.10+git.501.277ba349a01-150700.3.26.1
  • samba-python3-4.21.10+git.501.277ba349a01-150700.3.26.1
  • samba-4.21.10+git.501.277ba349a01-150700.3.26.1
  • python3-ldb-4.21.10+git.501.277ba349a01-150700.3.26.1
  • samba-winbind-4.21.10+git.501.277ba349a01-150700.3.26.1
  • libldb2-debuginfo-4.21.10+git.501.277ba349a01-150700.3.26.1
• Basesystem Module 15-SP7 (aarch64 x86_64)
  • samba-ceph-4.21.10+git.501.277ba349a01-150700.3.26.1
  • samba-ceph-debuginfo-4.21.10+git.501.277ba349a01-150700.3.26.1
• Basesystem Module 15-SP7 (x86_64)
  • libldb2-32bit-4.21.10+git.501.277ba349a01-150700.3.26.1
  • samba-winbind-libs-32bit-debuginfo-4.21.10+git.501.277ba349a01-150700.3.26.1
  • libldb2-32bit-debuginfo-4.21.10+git.501.277ba349a01-150700.3.26.1
  • samba-libs-32bit-debuginfo-4.21.10+git.501.277ba349a01-150700.3.26.1
  • samba-libs-32bit-4.21.10+git.501.277ba349a01-150700.3.26.1
  • samba-client-libs-32bit-debuginfo-4.21.10+git.501.277ba349a01-150700.3.26.1
  • samba-winbind-libs-32bit-4.21.10+git.501.277ba349a01-150700.3.26.1
  • samba-client-libs-32bit-4.21.10+git.501.277ba349a01-150700.3.26.1
• SUSE Linux Enterprise High Availability Extension 15 SP7 (aarch64 ppc64le s390x x86_64)
  • samba-debuginfo-4.21.10+git.501.277ba349a01-150700.3.26.1
  • samba-debugsource-4.21.10+git.501.277ba349a01-150700.3.26.1
  • ctdb-debuginfo-4.21.10+git.501.277ba349a01-150700.3.26.1
  • ctdb-4.21.10+git.501.277ba349a01-150700.3.26.1

References:

• https://www.suse.com/security/cve/CVE-2026-1933.html
• https://www.suse.com/security/cve/CVE-2026-2340.html
• https://www.suse.com/security/cve/CVE-2026-3012.html
• https://www.suse.com/security/cve/CVE-2026-3238.html
• https://www.suse.com/security/cve/CVE-2026-4408.html
• https://www.suse.com/security/cve/CVE-2026-4480.html
• https://bugzilla.suse.com/show_bug.cgi?id=1255755
• https://bugzilla.suse.com/show_bug.cgi?id=1257200
• https://bugzilla.suse.com/show_bug.cgi?id=1259441
• https://bugzilla.suse.com/show_bug.cgi?id=1261158
• https://bugzilla.suse.com/show_bug.cgi?id=1261159
• https://bugzilla.suse.com/show_bug.cgi?id=1261160
• https://bugzilla.suse.com/show_bug.cgi?id=1261161
• https://bugzilla.suse.com/show_bug.cgi?id=1261163
• https://bugzilla.suse.com/show_bug.cgi?id=1261188