Description
vfs.c in smbd in Samba 3.x and 4.x before 4.1.22, 4.2.x before 4.2.7, and 4.3.x before 4.3.3, when share names with certain substring relationships exist, allows remote attackers to bypass intended file-access restrictions via a symlink that points outside of a share.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | samba | 2:4.1.22+dfsg-1 | — |
| Debian 13 | samba | 2:4.1.22+dfsg-1 | — |
| Debian 12 | samba | 2:4.1.22+dfsg-1 | — |
| Debian 8 | samba | 2:4.1.17+dfsg-2+deb8u1 | DSA-3433-1 |
| Debian 7 | samba | 2:3.6.6-6+deb7u6 | DSA-3433-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 6.0 | samba | 2:3.5.6~dfsg-3squeeze13 | DLA-379-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | samba | 2:4.3.3+dfsg-1ubuntu1 | — |
| Ubuntu 14.04 LTS | samba | 2:4.1.6+dfsg-1ubuntu2.14.04.11 | USN-2855-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | ctdb +26 | 4.2.3-11.el7_2 | RHSA-2016:0006 |
| RHEL 6 | samba +12 | 3.6.23-24.el6_7 | RHSA-2016:0011 |
| RHEL 6 | samba4 +13 | 4.0.0-67.el6_7.rc4 | RHSA-2016:0010 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Gluster Storage 3 | ctdb +5 | 4.2.4-9.1.el7rhgs | RHSA-2016:0016 |
| Red Hat Gluster Storage 3 | samba +20 | 4.1.17-16.el6rhs | RHSA-2016:0016, RHSA-2016:0015 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | ldb | 1.1.24-4.1 | SUSE-SU-2015:2305-1 |
| SLES 12 SP1 | samba | 4.2.4-6.1 | SUSE-SU-2015:2305-1 |
| SLES 12 SP1 | talloc | 2.1.5-4.1 | SUSE-SU-2015:2305-1 |
| SLES 12 SP1 | tdb | 1.3.8-4.1 | SUSE-SU-2015:2305-1 |
| SLES 12 SP1 | tevent | 0.9.26-4.1 | SUSE-SU-2015:2305-1 |
| SLES 12 | ldb | 1.1.24-4.3.1 | SUSE-SU-2015:2304-1 |
| SLES 12 | samba | 4.1.12-18.3.1 | SUSE-SU-2015:2304-1 |
| SLES 12 | talloc | 2.1.5-3.4.1 | SUSE-SU-2015:2304-1 |
| SLES 12 | tdb | 1.3.8-2.3.1 | SUSE-SU-2015:2304-1 |
| SLES 12 | tevent | 0.9.26-3.3.1 | SUSE-SU-2015:2304-1 |
| SLES 11 SP4 | samba +1 | 3.6.3-64.1 | SUSE-SU-2016:0164-1 |
| SLES 11 SP3 | samba +1 | 3.6.3-64.1 | SUSE-SU-2016:0164-1 |
| SLES 11 SP2 | samba +1 | 3.6.3-45.2 | SUSE-SU-2016:0032-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP1 | ldb | 1.1.24-4.1 | SUSE-SU-2015:2305-1 |
| SLES for SAP 12 SP1 | samba | 4.2.4-6.1 | SUSE-SU-2015:2305-1 |
| SLES for SAP 12 SP1 | talloc | 2.1.5-4.1 | SUSE-SU-2015:2305-1 |
| SLES for SAP 12 SP1 | tdb | 1.3.8-4.1 | SUSE-SU-2015:2305-1 |
| SLES for SAP 12 SP1 | tevent | 0.9.26-4.1 | SUSE-SU-2015:2305-1 |
| SLES for SAP 12 | ldb | 1.1.24-4.3.1 | SUSE-SU-2015:2304-1 |
| SLES for SAP 12 | samba | 4.1.12-18.3.1 | SUSE-SU-2015:2304-1 |
| SLES for SAP 12 | talloc | 2.1.5-3.4.1 | SUSE-SU-2015:2304-1 |
| SLES for SAP 12 | tdb | 1.3.8-2.3.1 | SUSE-SU-2015:2304-1 |
| SLES for SAP 12 | tevent | 0.9.26-3.3.1 | SUSE-SU-2015:2304-1 |
| SLES for SAP 11 SP4 | samba +1 | 3.6.3-64.1 | SUSE-SU-2016:0164-1 |
| SLES for SAP 11 SP3 | samba +1 | 3.6.3-64.1 | SUSE-SU-2016:0164-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | samba | 4.5.0-1.1 | openSUSE-SU-2024:10069-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | samba +23 | 4.2.3-11.el7_2 | ELSA-2016-0006 |
Advisories 15
- WID-SEC-2026-3111 Samba: Mehrere Schwachstellen BSI CERT-Bund (WID) · Aug 31, 2026
- RHSA-2016:0015 Red Hat Security Advisory: samba security update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- RHSA-2016:0016 Red Hat Security Advisory: samba security update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- RHSA-2016:0011 Red Hat Security Advisory: samba security update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- RHSA-2016:0010 Red Hat Security Advisory: samba4 security update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- RHSA-2016:0006 Red Hat Security Advisory: samba security update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- USN-2855-1 samba vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-3433-1 samba - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-379-1 samba - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2016:0164-1 Security update for samba SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:2304-1 Security update for ldb, samba, talloc, tdb, tevent SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10069-1 ctdb-4.5.0-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:0032-1 Security update for samba SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:2305-1 Security update for ldb, samba, talloc, tdb, tevent SUSE / openSUSE Security Updates · May 2, 2025
- ELSA-2016-0006 Moderate: samba security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jan 7, 2016
References
- 79733 vdb-entry
- FEDORA-2015-0e0879cc8a vendor-advisory
- openSUSE-SU-2016:1064 vendor-advisory
- USN-2855-2 vendor-advisory
- SUSE-SU-2016:0032 vendor-advisory
- SUSE-SU-2015:2304 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
- SUSE-SU-2015:2305 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1290288
- SUSE-SU-2016:0164 vendor-advisory
- openSUSE-SU-2015:2354 vendor-advisory
- SUSE-SU-2016:1105 vendor-advisory
- FEDORA-2015-b36076d32e vendor-advisory
- openSUSE-SU-2016:1106 vendor-advisory
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05115993
- https://git.samba.org/?p=samba.git%3Ba=commit%3Bh=4278ef25f64d5fdbf432ff1534e275416ec9561e
- 1034493 vdb-entry
- DSA-3433 vendor-advisory
- openSUSE-SU-2016:1107 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.html
- GLSA-201612-47 vendor-advisory
- https://www.samba.org/samba/security/CVE-2015-5252.html
- USN-2855-1 vendor-advisory
- openSUSE-SU-2015:2356 vendor-advisory