What is CVE-2017-14746?

CVE-2017-14746 is a critical-severity vulnerability in Samba, classified under Use After Free. CVSS score: 9.8/10. Published 2017-11-27.

How severe is CVE-2017-14746?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2017-14746 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Use After Free in Samba

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.

Vulnerability class: Use-After-Free

Published 2017-11-27 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.099 (95.4th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 95.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.099 · newest: 0.099 · change: 0.000

Affected products

Samba
Canonical Ubuntu Linux — versions 14.04, 16.04, 17.04
Debian Linux — versions 8.0, 9.0
Red Hat Enterprise Linux Desktop — versions 6.0, 7.0
Red Hat Enterprise Linux Server — versions 6.0, 7.0
Red Hat Enterprise Linux Workstation — versions 6.0, 7.0

Weakness classification (CWE)

CWE-416 — Use After Free

Public proof-of-concept exploits

ARPSyndicate/cve-scores

References

www.samba.org/samba/security/CVE-2017-14746.html (Issue Tracking, Vendor Advisory)
access.redhat.com/errata/RHSA-2017:3278 (vendor-advisory, Third Party Advisory)
www.debian.org/security/2017/dsa-4043 (vendor-advisory, Third Party Advisory)
access.redhat.com/errata/RHSA-2017:3260 (vendor-advisory, Third Party Advisory)
www.securitytracker.com/id/1039856 (VDB Entry, Third Party Advisory, vdb-entry)
www.securityfocus.com/bid/101907 (VDB Entry, Third Party Advisory, vdb-entry)
access.redhat.com/errata/RHSA-2017:3261 (vendor-advisory, Third Party Advisory)
support.hpe.com/hpsc/doc/public/display (Third Party Advisory)
security.gentoo.org/glsa/201805-07 (vendor-advisory, Third Party Advisory)
www.ubuntu.com/usn/USN-3486-1 (vendor-advisory, Third Party Advisory)

Frequently asked questions

What is CVE-2017-14746?: CVE-2017-14746 is a critical-severity vulnerability in Samba, classified under Use After Free. CVSS score: 9.8/10. Published 2017-11-27.
How severe is CVE-2017-14746?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2017-14746 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.