NVD / CVE Program· CNA mitre

CVE-2017-14746: Use-after-free vulnerability in Samba 4.x before 4.7.3 allows remote attackers to execute arbitrary code via a crafted SMB1 request.

CriticalCVSS 9.8 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Plan (action score 42/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 9.8% (FIRST EPSS); higher than 95.6% of all records.
Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
Fixed version: samba (Alpine:v3.10) 4.7.3-r0; samba (Alpine:v3.4) 4.4.16-r1; samba (Debian:12) 2:4.7.1+dfsg-2.

Add it to your regular patch cycle. Upgrade to samba (Alpine:v3.10) 4.7.3-r0; samba (Alpine:v3.4) 4.4.16-r1; samba (Debian:12) 2:4.7.1+dfsg-2 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Published: Nov 27, 2017
Updated: Jun 16, 2026
EPSS: 9.8% · 95th percentile
CWE: CWE-416

Report tools

JSON

Action score

Plan

Add it to your regular patch cycle.

CVSS: 39 / 40 · 9.8 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 3 / 30 · 9.8%

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
samba	samba	cpe:2.3:a:samba:samba
canonical	ubuntu linux	cpe:2.3:o:canonical:ubuntu_linux
debian	debian linux	cpe:2.3:o:debian:debian_linux
redhat	enterprise linux desktop	cpe:2.3:o:redhat:enterprise_linux_desktop
redhat	enterprise linux server	cpe:2.3:o:redhat:enterprise_linux_server
redhat	enterprise linux workstation	cpe:2.3:o:redhat:enterprise_linux_workstation

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

canonical ubuntu linux14.04
canonical ubuntu linux16.04
canonical ubuntu linux17.04
canonical ubuntu linux17.10
debian debian linux8.0
debian debian linux9.0
redhat enterprise linux desktop6.0
redhat enterprise linux desktop7.0

+8 more rows

redhat enterprise linux server6.0
redhat enterprise linux server7.0
redhat enterprise linux workstation6.0
redhat enterprise linux workstation7.0
samba samba4.7.0 and later · before 4.7.3
samba samba4.6.0 and later · before 4.6.11
samba samba4.5.0 and later · before 4.5.15
samba samba4.0.0 and later · before 4.5.0

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
Alpine:v3.10	samba	from 4.0.0 · before 4.7.3-r0	4.7.3-r0
Alpine:v3.4	samba	from 4.0.0 · before 4.4.16-r1	4.4.16-r1
Debian:12	samba	before 2:4.7.1+dfsg-2	2:4.7.1+dfsg-2
Debian:8	samba	before 2:4.2.14+dfsg-0+deb8u9	2:4.2.14+dfsg-0+deb8u9
Debian:9	samba	before 2:4.5.12+dfsg-2+deb9u1	2:4.5.12+dfsg-2+deb9u1
Red Hat:enterprise_linux:6::client	samba4	before 0:4.2.10-12.el6_9	0:4.2.10-12.el6_9
Red Hat:enterprise_linux:6::client	samba4-client	before 0:4.2.10-12.el6_9	0:4.2.10-12.el6_9
Red Hat:enterprise_linux:6::client	samba4-common	before 0:4.2.10-12.el6_9	0:4.2.10-12.el6_9
Red Hat:enterprise_linux:6::client	samba4-dc	before 0:4.2.10-12.el6_9	0:4.2.10-12.el6_9
Red Hat:enterprise_linux:6::client	samba4-dc-libs	before 0:4.2.10-12.el6_9	0:4.2.10-12.el6_9
Red Hat:enterprise_linux:6::client	samba4-debuginfo	before 0:4.2.10-12.el6_9	0:4.2.10-12.el6_9
Red Hat:enterprise_linux:6::client	samba4-devel	before 0:4.2.10-12.el6_9	0:4.2.10-12.el6_9
Red Hat:enterprise_linux:6::client	samba4-libs	before 0:4.2.10-12.el6_9	0:4.2.10-12.el6_9
Red Hat:enterprise_linux:6::client	samba4-pidl	before 0:4.2.10-12.el6_9	0:4.2.10-12.el6_9
Red Hat:enterprise_linux:6::client	samba4-python	before 0:4.2.10-12.el6_9	0:4.2.10-12.el6_9
Red Hat:enterprise_linux:6::client	samba4-test	before 0:4.2.10-12.el6_9	0:4.2.10-12.el6_9
Red Hat:enterprise_linux:6::client	samba4-winbind	before 0:4.2.10-12.el6_9	0:4.2.10-12.el6_9
Red Hat:enterprise_linux:6::client	samba4-winbind-clients	before 0:4.2.10-12.el6_9	0:4.2.10-12.el6_9
Red Hat:enterprise_linux:6::client	samba4-winbind-krb5-locator	before 0:4.2.10-12.el6_9	0:4.2.10-12.el6_9
Red Hat:enterprise_linux:7::client	libsmbclient	before 0:4.6.2-12.el7_4	0:4.6.2-12.el7_4
Red Hat:enterprise_linux:7::client	libsmbclient-devel	before 0:4.6.2-12.el7_4	0:4.6.2-12.el7_4
Red Hat:enterprise_linux:7::client	libwbclient	before 0:4.6.2-12.el7_4	0:4.6.2-12.el7_4
Red Hat:enterprise_linux:7::client	libwbclient-devel	before 0:4.6.2-12.el7_4	0:4.6.2-12.el7_4
Red Hat:enterprise_linux:7::client	samba	before 0:4.6.2-12.el7_4	0:4.6.2-12.el7_4

+80

Same product

samba: all records

Other highest-scoring records for the same primary product.

CVE-2017-7494Samba since version 3.5.0 and before 4.6.4, 4.5.10 and 4.4.14 is vulnerable to remote code execution vulnerability, allowing a malicious…KEV
99Now
CVE-2015-0240The Netlogon server implementation in smbd in Samba 3.5.x and 3.6.x before 3.6.25, 4.0.x before 4.0.25, 4.1.x before 4.1.17, and 4.2.x…
66This week
CVE-2003-0085Buffer overflow in the SMB/CIFS packet fragment re-assembly code for SMB daemon (smbd) in Samba before 2.2.8, and Samba-TNG before 0.3.1…
66This week

Published before and after this one in the same product

← EarlierCVE-2016-2126May 11, 2017 · Samba version 4.0.0 up to 4.5.2 is vulnerable to privilege elevation due to incorrect handling of the PAC (Privilege Attribute Certificate)…
28Monitor
← EarlierCVE-2017-9461Jun 6, 2017 · smbd in Samba before 4.4.10 and 4.5.x before 4.5.6 has a denial of service vulnerability (fd_open_atomic infinite loop with high CPU usage…
27Monitor
Later →CVE-2017-15275Nov 27, 2017 · Samba before 4.7.3 might allow remote attackers to obtain sensitive information by leveraging failure of the server to clear allocated heap…
36Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
alpine:samba	4.7.3-r0 · Alpine:v3.10	Package registry (OSV)
debian:samba	2:4.7.1+dfsg-2 · Debian:12	Package registry (OSV)
red hat:libsmbclient	0:4.6.2-12.el7_4 · Red Hat:enterprise_linux:7::client	Package registry (OSV)
red hat:libwbclient	0:4.6.2-12.el7_4 · Red Hat:enterprise_linux:7::client	Package registry (OSV)
red hat:samba	0:4.6.2-12.el7_4 · Red Hat:enterprise_linux:7::client	Package registry (OSV)
red hat:samba-client	0:4.6.2-12.el7_4 · Red Hat:enterprise_linux:7::client	Package registry (OSV)
red hat:samba-client-libs	0:4.6.2-12.el7_4 · Red Hat:enterprise_linux:7::client	Package registry (OSV)
red hat:samba-common	0:4.6.2-12.el7_4 · Red Hat:enterprise_linux:7::client	Package registry (OSV)
red hat:samba-common-libs	0:4.6.2-12.el7_4 · Red Hat:enterprise_linux:7::client	Package registry (OSV)
red hat:samba-common-tools	0:4.6.2-12.el7_4 · Red Hat:enterprise_linux:7::client	Package registry (OSV)
red hat:samba-debuginfo	0:4.6.2-12.el7_4 · Red Hat:enterprise_linux:7::client	Package registry (OSV)
red hat:samba-krb5-printing	0:4.6.2-12.el7_4 · Red Hat:enterprise_linux:7::client	Package registry (OSV)
red hat:samba-libs	0:4.6.2-12.el7_4 · Red Hat:enterprise_linux:7::client	Package registry (OSV)
red hat:samba-winbind	0:4.6.2-12.el7_4 · Red Hat:enterprise_linux:7::client	Package registry (OSV)
suse:samba	4.2.4-28.24.1 · SUSE:OpenStack Cloud 6	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: high · data can be read
Integrity: high · data or configuration can be modified
Availability: high · the service can be disrupted

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

Weakness class (CWE)

CWE-416 · Use After Free

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd-primary

Root cause

After a memory region is freed, another reference pointing to it is still used. By then, the same region may have been allocated for different data.

The bug in code

The whole CWE-416 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1free(dev->buf);
2/* ... another thread is still running ... */
3process(dev->buf);

Fixed

1lock(&dev->lock);
2free(dev->buf);
3dev->buf = NULL;
4unlock(&dev->lock);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log (1)

Fix✗ → ✓Sep 28, 2026, 10:46 PM UTC

For records you follow, these changes also arrive as notifications. →

References

www.securityfocus.com/bid/101907

Show all references (10 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records