What is CVE-2018-1123?

CVE-2018-1123 is a low-severity vulnerability in Procps-Ng Project, classified under Heap-based Buffer Overflow. CVSS score: 3.9/10. Published 2018-05-23.

How severe is CVE-2018-1123?

Low severity. CVSS v3 base score is 3.9 out of 10.

Is CVE-2018-1123 known to be exploited?

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

Buffer overflow in Procps-Ng Project

CVE-2018-1123

procps-ng before version 3.3.15 is vulnerable to a denial of service in ps via mmap buffer overflow. Inbuilt protection in ps maps a guard page at the end of the overflowed buffer, ensuring that the impact of this flaw is limited to a crash (temporary denial of service).

Vulnerability class: Buffer Overflow

Published 2018-05-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 3.9 (Low). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L.

EPSS exploit prediction

EPSS: 0.089 (95.2th percentile), scored 2026-11-01.

Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 95.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.089 · newest: 0.089 · change: 0.000

Affected products

Procps-Ng Project
[Unknown] Procps-Ng, Procps — versions procps-ng 3.3.15
Canonical Ubuntu Linux — versions 12.04, 14.04, 16.04
Debian Linux — versions 7.0, 8.0, 9.0

Weakness classification (CWE)

Public proof-of-concept exploits

References

usn.ubuntu.com/3658-1/ (vendor-advisory, Third Party Advisory)
www.debian.org/security/2018/dsa-4208 (vendor-advisory, Third Party Advisory)
security.gentoo.org/glsa/201805-14 (vendor-advisory, Third Party Advisory)
www.exploit-db.com/exploits/44806/ (VDB Entry, Third Party Advisory, exploit)
lists.debian.org/debian-lts-announce/2018/05/msg00021.html (mailing-list, Third Party Advisory)
usn.ubuntu.com/3658-3/ (vendor-advisory, Third Party Advisory)
www.securityfocus.com/bid/104214 (VDB Entry, Third Party Advisory, vdb-entry)
seclists.org/oss-sec/2018/q2/122 (mailing-list, Mailing List, Third Party Advisory)
bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
www.qualys.com/2018/05/17/procps-ng-audit-report-advisory.txt (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2018-1123?: CVE-2018-1123 is a low-severity vulnerability in Procps-Ng Project, classified under Heap-based Buffer Overflow. CVSS score: 3.9/10. Published 2018-05-23.
How severe is CVE-2018-1123?: Low severity. CVSS v3 base score is 3.9 out of 10.
Is CVE-2018-1123 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.