What is CVE-2017-15275?

CVE-2017-15275 is a high-severity vulnerability in Samba, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.5/10. Published 2017-11-27.

How severe is CVE-2017-15275?

High severity. CVSS v3 base score is 7.5 out of 10.

Buffer overflow in Samba

CVE-2017-15275

Samba before 4.7.3 might allow remote attackers to obtain sensitive information by leveraging failure of the server to clear allocated heap memory.

Vulnerability class: Buffer Overflow

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

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.214 (97.5th percentile), scored 2026-09-28.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 97.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.214 · newest: 0.214 · 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-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

References

access.redhat.com/errata/RHSA-2017:3278 (vendor-advisory, Third Party Advisory)
www.ubuntu.com/usn/USN-3486-2 (vendor-advisory, Third Party Advisory)
www.debian.org/security/2017/dsa-4043 (vendor-advisory, Third Party Advisory)
lists.debian.org/debian-lts-announce/2017/11/msg00029.html (mailing-list, Mailing List, Third Party Advisory)
access.redhat.com/errata/RHSA-2017:3260 (vendor-advisory, Third Party Advisory)
www.samba.org/samba/security/CVE-2017-15275.html (Vendor Advisory)
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-2017-15275?: CVE-2017-15275 is a high-severity vulnerability in Samba, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.5/10. Published 2017-11-27.
How severe is CVE-2017-15275?: High severity. CVSS v3 base score is 7.5 out of 10.