ESB-2026.5750

=========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2026.5750 Security update for samba 27 May 2026 =========================================================================== AUSCERT Security Bulletin Summary --------------------------------- Product: samba Publisher: SUSE Operating System: SUSE Resolution: Patch/Upgrade CVE Names: CVE-2026-2340 CVE-2026-3238 CVE-2026-4408 CVE-2026-4480 Original Bulletin: https://www.suse.com/support/update/announcement/2026/suse-su-20262071-1 Comment: CVSS (Max): 10.0 CVE-2026-4480 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H) CVSS Source: SUSE Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H EPSS (Max): None available when published - --------------------------BEGIN INCLUDED TEXT-------------------- Security update for samba Announcement ID: SUSE-SU-2026:2071-1 Release Date: 2026-05-26T12:34:36Z Rating: critical o bsc#1252963 o bsc#1261158 References: o bsc#1261160 o bsc#1261161 o bsc#1261163 o CVE-2026-2340 o CVE-2026-3238 Cross-References: o CVE-2026-4408 o CVE-2026-4480 o 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 o 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 o 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 o 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 CVSS scores: o 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 o 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 o 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 o 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 o openSUSE Leap 15.3 Affected o SUSE Enterprise Storage 7.1 Products: o SUSE Linux Enterprise Micro 5.2 o SUSE Linux Enterprise Micro for Rancher 5.2 o SUSE Linux Enterprise Server 15 SP3 An update that solves four vulnerabilities and has one security fix can now be installed. Description: This update for samba fixes the following issues o CVE-2026-2340: vfs_worm does not block directory modification (bsc# 1261158). o CVE-2026-3238: unauthenticated udp packet crashes AD DC nbt server (bsc# 1261160). o CVE-2026-4408: Remote Code Execution in SAMR (bsc#1261163). o CVE-2026-4480: Unauthenticated Remote Code Execution (bsc#1261161). 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: o openSUSE Leap 15.3 zypper in -t patch SUSE-2026-2071=1 o SUSE Linux Enterprise Micro 5.2 zypper in -t patch SUSE-SUSE-MicroOS-5.2-2026-2071=1 o SUSE Linux Enterprise Micro for Rancher 5.2 zypper in -t patch SUSE-SUSE-MicroOS-5.2-2026-2071=1 o SUSE Enterprise Storage 7.1 zypper in -t patch SUSE-Storage-7.1-2026-2071=1 Package List: o openSUSE Leap 15.3 (x86_64) samba-client-libs-32bit-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-libs-python3-32bit-debuginfo-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-client-32bit-debuginfo-4.15.13+git.780.d2f53cbcded-150300.3.103.1 libsamba-policy0-python3-32bit-debuginfo-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-ad-dc-libs-32bit-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-libs-32bit-debuginfo-4.15.13+git.780.d2f53cbcded-150300.3.103.1 libsamba-policy0-python3-32bit-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-libs-python3-32bit-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-winbind-libs-32bit-debuginfo-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-winbind-libs-32bit-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-libs-32bit-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-ad-dc-libs-32bit-debuginfo-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-devel-32bit-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-client-libs-32bit-debuginfo-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-client-32bit-4.15.13+git.780.d2f53cbcded-150300.3.103.1 o openSUSE Leap 15.3 (aarch64 ppc64le s390x x86_64 i586) libsamba-policy-devel-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-client-libs-debuginfo-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-tool-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-winbind-libs-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-winbind-libs-debuginfo-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-python3-debuginfo-4.15.13+git.780.d2f53cbcded-150300.3.103.1 ctdb-pcp-pmda-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-devel-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-libs-4.15.13+git.780.d2f53cbcded-150300.3.103.1 ctdb-debuginfo-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-libs-python3-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-libs-debuginfo-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-client-libs-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-ad-dc-libs-debuginfo-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-ldb-ldap-debuginfo-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-winbind-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-client-debuginfo-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-test-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-ad-dc-debuginfo-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-ad-dc-libs-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-dsdb-modules-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-dsdb-modules-debuginfo-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-gpupdate-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-winbind-debuginfo-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-debuginfo-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-debugsource-4.15.13+git.780.d2f53cbcded-150300.3.103.1 libsamba-policy0-python3-debuginfo-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-libs-python3-debuginfo-4.15.13+git.780.d2f53cbcded-150300.3.103.1 ctdb-pcp-pmda-debuginfo-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-ad-dc-4.15.13+git.780.d2f53cbcded-150300.3.103.1 ctdb-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-client-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-python3-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-ldb-ldap-4.15.13+git.780.d2f53cbcded-150300.3.103.1 libsamba-policy-python3-devel-4.15.13+git.780.d2f53cbcded-150300.3.103.1 libsamba-policy0-python3-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-test-debuginfo-4.15.13+git.780.d2f53cbcded-150300.3.103.1 o openSUSE Leap 15.3 (aarch64 x86_64) samba-ceph-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-ceph-debuginfo-4.15.13+git.780.d2f53cbcded-150300.3.103.1 o openSUSE Leap 15.3 (noarch) samba-doc-4.15.13+git.780.d2f53cbcded-150300.3.103.1 o openSUSE Leap 15.3 (aarch64_ilp32) samba-client-64bit-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-libs-python3-64bit-debuginfo-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-devel-64bit-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-ad-dc-libs-64bit-debuginfo-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-libs-64bit-debuginfo-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-winbind-libs-64bit-debuginfo-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-libs-python3-64bit-4.15.13+git.780.d2f53cbcded-150300.3.103.1 libsamba-policy0-python3-64bit-debuginfo-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-libs-64bit-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-client-libs-64bit-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-winbind-libs-64bit-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-client-64bit-debuginfo-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-client-libs-64bit-debuginfo-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-ad-dc-libs-64bit-4.15.13+git.780.d2f53cbcded-150300.3.103.1 libsamba-policy0-python3-64bit-4.15.13+git.780.d2f53cbcded-150300.3.103.1 o SUSE Linux Enterprise Micro 5.2 (aarch64 s390x x86_64) samba-debuginfo-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-client-libs-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-client-libs-debuginfo-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-debugsource-4.15.13+git.780.d2f53cbcded-150300.3.103.1 o SUSE Linux Enterprise Micro for Rancher 5.2 (aarch64 s390x x86_64) samba-debuginfo-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-client-libs-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-client-libs-debuginfo-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-debugsource-4.15.13+git.780.d2f53cbcded-150300.3.103.1 o SUSE Enterprise Storage 7.1 (aarch64 x86_64) ctdb-debuginfo-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-client-debuginfo-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-libs-python3-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-ceph-4.15.13+git.780.d2f53cbcded-150300.3.103.1 ctdb-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-libs-debuginfo-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-client-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-winbind-debuginfo-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-debuginfo-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-libs-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-ceph-debuginfo-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-debugsource-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-winbind-4.15.13+git.780.d2f53cbcded-150300.3.103.1 samba-libs-python3-debuginfo-4.15.13+git.780.d2f53cbcded-150300.3.103.1 References: o https://www.suse.com/security/cve/CVE-2026-2340.html o https://www.suse.com/security/cve/CVE-2026-3238.html o https://www.suse.com/security/cve/CVE-2026-4408.html o https://www.suse.com/security/cve/CVE-2026-4480.html o https://bugzilla.suse.com/show_bug.cgi?id=1252963 o https://bugzilla.suse.com/show_bug.cgi?id=1261158 o https://bugzilla.suse.com/show_bug.cgi?id=1261160 o https://bugzilla.suse.com/show_bug.cgi?id=1261161 o https://bugzilla.suse.com/show_bug.cgi?id=1261163 - --------------------------END INCLUDED TEXT---------------------- You have received this e-mail bulletin as a result of your organisation's registration with AUSCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AUSCERT's members. As AUSCERT did not write the document quoted above, AUSCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AUSCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://portal.auscert.org.au/bulletins/ =========================================================================== AUSCERT The University of Queensland, Brisbane QLD 4072 Australia e: auscert@auscert.org.au t: +61 (0)7 3365 4417 Allies in Cyber Security ===========================================================================