What is CVE-2018-5251?

CVE-2018-5251 is a medium-severity vulnerability in Libming, classified under Incorrect Conversion between Numeric Types. CVSS score: 6.5/10. Published 2018-01-05.

How severe is CVE-2018-5251?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Libming

CVE-2018-5251

In libming 0.4.8, there is an integer signedness error vulnerability (left shift of a negative value) in the readSBits function (util/read.c). Remote attackers can leverage this vulnerability to cause a denial of service via a crafted swf file.

Published 2018-01-05 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.019 (78.4th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 78th percentile — 78.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.019 · newest: 0.019 · change: 0.000

Affected products

Libming — versions 0.4.8
Debian Linux — versions 7.0

Weakness classification (CWE)

CWE-681 — Incorrect Conversion between Numeric Types

References

lists.debian.org/debian-lts-announce/2018/03/msg00008.html (mailing-list, Third Party Advisory)
github.com/libming/libming/issues/97 (Exploit, Third Party Advisory, Issue Tracking)
security.gentoo.org/glsa/201904-24 (vendor-advisory, Third Party Advisory)

Frequently asked questions

What is CVE-2018-5251?: CVE-2018-5251 is a medium-severity vulnerability in Libming, classified under Incorrect Conversion between Numeric Types. CVSS score: 6.5/10. Published 2018-01-05.
How severe is CVE-2018-5251?: Medium severity. CVSS v3 base score is 6.5 out of 10.