The SMB1 implementation in smbd in Samba 3.x and 4.x before 4.1.23, 4.2.x before 4.2.9…
Priority MEDIUM 43CWE-284Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Partial Red Hat: 19 fixed, 1 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-284.
Summary
The SMB1 implementation in smbd in Samba 3.x and 4.x before 4.1.23, 4.2.x before 4.2.9, 4.3.x before 4.3.6, and 4.4.x before 4.4.0rc4 allows remote authenticated users to modify arbitrary ACLs by using a UNIX SMB1 call to create a symlink, and then using a non-UNIX SMB1 call to write to the ACL content.
Why it matters now
EPSS 0.12938 96th percentileScored 2026-11-07
Fix Partial Red Hat: 3 advisoriesRed Hat: 19 fixed, 1 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 9
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* | 3.2.0 to before 4.1.23; 4.2.0 to before 4.2.9; 4.3.0 to before 4.3.6 | Vulnerable | Samba |
| cpe:2.3:a:samba:samba:4.4.0:rc1:*:*:*:*:*:* | 4.4.0 rc1 | Vulnerable | Samba |
| cpe:2.3:a:samba:samba:4.4.0:rc2:*:*:*:*:*:* | 4.4.0 rc2 | Vulnerable | Samba |
| cpe:2.3:a:samba:samba:4.4.0:rc3:*:*:*:*:*:* | 4.4.0 rc3 | Vulnerable | Samba |
| cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:-:*:*:* | 12.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:* | 14.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:15.10:*:*:*:*:*:*:* | 15.10 | Vulnerable | Canonical |
| cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Debian |
| cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* | 8.0 | Vulnerable | Debian |
- cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* Versions 3.2.0 to before 4.1.23; 4.2.0 to before 4.2.9; 4.3.0 to before 4.3.6 Vulnerable ·Samba
- cpe:2.3:a:samba:samba:4.4.0:rc1:*:*:*:*:*:* Versions 4.4.0 rc1 Vulnerable ·Samba
- cpe:2.3:a:samba:samba:4.4.0:rc2:*:*:*:*:*:* Versions 4.4.0 rc2 Vulnerable ·Samba
- cpe:2.3:a:samba:samba:4.4.0:rc3:*:*:*:*:*:* Versions 4.4.0 rc3 Vulnerable ·Samba
- cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:-:*:*:* Versions 12.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:* Versions 14.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:15.10:*:*:*:*:*:*:* Versions 15.10 Vulnerable ·Canonical
- cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Debian
- cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
Remediation
Red Hat 3 advisories
- RHSA-2016:0448 Released 2016-03-15 · Red Hat rating Moderatesamba security update
- Red Hat Enterprise Linux Client (v. 7) libsmbclient-4.2.3-12.el7_2, libwbclient-4.2.3-12.el7_2, samba-4.2.3-12.el7_2 +9
- Red Hat Enterprise Linux Client Optional (v. 7) libsmbclient-devel-4.2.3-12.el7_2, libwbclient-devel-4.2.3-12.el7_2, samba-4.2.3-12.el7_2 +10
- Red Hat Enterprise Linux ComputeNode (v. 7) libsmbclient-4.2.3-12.el7_2, libwbclient-4.2.3-12.el7_2, samba-4.2.3-12.el7_2 +9
- Red Hat Enterprise Linux ComputeNode Optional (v. 7) libsmbclient-devel-4.2.3-12.el7_2, libwbclient-devel-4.2.3-12.el7_2, samba-4.2.3-12.el7_2 +10
- Red Hat Enterprise Linux Desktop (v. 6) libsmbclient-3.6.23-25.el6_7, samba-3.6.23-25.el6_7, samba-client-3.6.23-25.el6_7 +3
- Red Hat Enterprise Linux Desktop Optional (v. 6) libsmbclient-devel-3.6.23-25.el6_7, samba-3.6.23-25.el6_7, samba-doc-3.6.23-25.el6_7 +5
- Red Hat Enterprise Linux HPC Node (v. 6) samba-3.6.23-25.el6_7, samba-client-3.6.23-25.el6_7, samba-common-3.6.23-25.el6_7 +2
- Red Hat Enterprise Linux HPC Node Optional (v. 6) libsmbclient-3.6.23-25.el6_7, libsmbclient-devel-3.6.23-25.el6_7, samba-3.6.23-25.el6_7 +6
- Red Hat Enterprise Linux Server (v. 6) libsmbclient-3.6.23-25.el6_7, libsmbclient-3.6.23-25.el6_7.ppc, samba-3.6.23-25.el6_7 +6
- Red Hat Enterprise Linux Server (v. 7) libsmbclient-4.2.3-12.el7_2, libsmbclient-4.2.3-12.el7_2.ppc, libwbclient-4.2.3-12.el7_2 +15
- Red Hat Enterprise Linux Server Optional (v. 6) libsmbclient-devel-3.6.23-25.el6_7, libsmbclient-devel-3.6.23-25.el6_7.ppc, samba-doc-3.6.23-25.el6_7 +6
- Red Hat Enterprise Linux Server Optional (v. 7) libsmbclient-devel-4.2.3-12.el7_2, libsmbclient-devel-4.2.3-12.el7_2.ppc, libwbclient-devel-4.2.3-12.el7_2 +13
- Red Hat Enterprise Linux Server Resilient Storage (v. 7) ctdb-4.2.3-12.el7_2, ctdb-devel-4.2.3-12.el7_2, ctdb-tests-4.2.3-12.el7_2
- Red Hat Enterprise Linux Workstation (v. 6) libsmbclient-3.6.23-25.el6_7, samba-3.6.23-25.el6_7, samba-client-3.6.23-25.el6_7 +3
- Red Hat Enterprise Linux Workstation (v. 7) libsmbclient-4.2.3-12.el7_2, libwbclient-4.2.3-12.el7_2, samba-4.2.3-12.el7_2 +10
- Red Hat Enterprise Linux Workstation Optional (v. 6) libsmbclient-devel-3.6.23-25.el6_7, samba-doc-3.6.23-25.el6_7, samba-domainjoin-gui-3.6.23-25.el6_7 +4
- Red Hat Enterprise Linux Workstation Optional (v. 7) libsmbclient-devel-4.2.3-12.el7_2, libwbclient-devel-4.2.3-12.el7_2, samba-dc-4.2.3-12.el7_2 +8
- RHSA-2016:0447 Released 2016-03-15 · Red Hat rating Moderatesamba security and bug fix update
- Red Hat Gluster 3 Samba on RHEL-6 ctdb-4.2.4-15.el6rhs, ctdb-devel-4.2.4-15.el6rhs, ctdb-tests-4.2.4-15.el6rhs +24
- Red Hat Gluster 3 Samba on RHEL-7 ctdb-4.2.4-15.el7rhgs, ctdb-devel-4.2.4-15.el7rhgs, ctdb-tests-4.2.4-15.el7rhgs +24
- RHSA-2016:0449 Released 2016-03-15 · Red Hat rating Moderatesamba4 security update
- Red Hat Enterprise Linux Desktop (v. 6) samba4-4.0.0-68.el6_7.rc4, samba4-client-4.0.0-68.el6_7.rc4, samba4-common-4.0.0-68.el6_7.rc4 +11
- Red Hat Enterprise Linux HPC Node (v. 6) samba4-4.0.0-68.el6_7.rc4, samba4-client-4.0.0-68.el6_7.rc4, samba4-common-4.0.0-68.el6_7.rc4 +11
- Red Hat Enterprise Linux Server (v. 6) samba4-4.0.0-68.el6_7.rc4, samba4-client-4.0.0-68.el6_7.rc4, samba4-common-4.0.0-68.el6_7.rc4 +11
- Red Hat Enterprise Linux Workstation (v. 6) samba4-4.0.0-68.el6_7.rc4, samba4-client-4.0.0-68.el6_7.rc4, samba4-common-4.0.0-68.el6_7.rc4 +11
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 5 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux Client (v. 7) | Fixed | RHSA-2016:0448 |
| Red Hat Enterprise Linux Client Optional (v. 7) | Fixed | RHSA-2016:0448 |
| Red Hat Enterprise Linux ComputeNode (v. 7) | Fixed | RHSA-2016:0448 |
| Red Hat Enterprise Linux ComputeNode Optional (v. 7) | Fixed | RHSA-2016:0448 |
| Red Hat Enterprise Linux Desktop (v. 6) | Fixed | RHSA-2016:0448, RHSA-2016:0449 |
| Red Hat Enterprise Linux Desktop Optional (v. 6) | Fixed | RHSA-2016:0448 |
| Red Hat Enterprise Linux HPC Node (v. 6) | Fixed | RHSA-2016:0448, RHSA-2016:0449 |
| Red Hat Enterprise Linux HPC Node Optional (v. 6) | Fixed | RHSA-2016:0448 |
| Red Hat Enterprise Linux Server (v. 6) | Fixed | RHSA-2016:0448, RHSA-2016:0449 |
| Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2016:0448 |
| Red Hat Enterprise Linux Server Optional (v. 6) | Fixed | RHSA-2016:0448 |
| Red Hat Enterprise Linux Server Optional (v. 7) | Fixed | RHSA-2016:0448 |
| Red Hat Enterprise Linux Server Resilient Storage (v. 7) | Fixed | RHSA-2016:0448 |
| Red Hat Enterprise Linux Workstation (v. 6) | Fixed | RHSA-2016:0448, RHSA-2016:0449 |
| Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2016:0448 |
| Red Hat Enterprise Linux Workstation Optional (v. 6) | Fixed | RHSA-2016:0448 |
| Red Hat Enterprise Linux Workstation Optional (v. 7) | Fixed | RHSA-2016:0448 |
| Red Hat Gluster 3 Samba on RHEL-6 | Fixed | RHSA-2016:0447 |
| Red Hat Gluster 3 Samba on RHEL-7 | Fixed | RHSA-2016:0447 |
Not affected: 1 product
- Red Hat Enterprise Linux 5
Timeline
- 2026-10-02 Threatist record created from CVE-2015-7560
- 2026-10-03 Alias added: GHSA-8wq4-qh3h-2hhh
References
Advisory 17
- openSUSE-SU-2016:1064
- SUSE-SU-2016:0837
- openSUSE-SU-2016:0813
- openSUSE-SU-2016:0877
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05121842
- FEDORA-2016-cad77a4576
- SUSE-SU-2016:0814
- https://www.samba.org/samba/security/CVE-2015-7560.html
- https://bugzilla.samba.org/show_bug.cgi?id=11648
- openSUSE-SU-2016:1106
- FEDORA-2016-4b55f00d00
- FEDORA-2016-ed1587f6ba
- openSUSE-SU-2016:1107
- SUSE-SU-2016:0905
- SUSE-SU-2016:0816
- USN-2922-1
- DSA-3514
Sources
- CVE-2015-7560 · CVE Program
- CVE-2015-7560 · NVD
- FIRST EPSS
- GHSA-8wq4-qh3h-2hhh · GitHub Advisory Database · CC BY 4.0
- CVE-2015-7560 · Red Hat security data · CC BY 4.0
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