What is CVE-2018-7639?

CVE-2018-7639 is a high-severity vulnerability in Cimg, classified under Out-of-bounds Read. CVSS score: 7.8/10. Published 2018-03-02.

How severe is CVE-2018-7639?

High severity. CVSS v3 base score is 7.8 out of 10.

Is CVE-2018-7639 known to be exploited?

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

Out-of-bounds Read in Cimg

CVE-2018-7639

An issue was discovered in CImg v.220. A heap-based buffer over-read in load_bmp in CImg.h occurs when loading a crafted bmp image, a different vulnerability than CVE-2018-7588. This is in a "16 bits colors" case, aka case 16.

Vulnerability class: Buffer Overflow

Published 2018-03-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.012 (67.7th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 68th percentile — 67.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Cimg — versions .220

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

Public proof-of-concept exploits

xiaoqx/pocs

References

github.com/dtschump/CImg/issues/185 (Exploit, Third Party Advisory)
lists.debian.org/debian-lts-announce/2019/09/msg00030.html (mailing-list)
lists.debian.org/debian-lts-announce/2020/10/msg00033.html (mailing-list)

Frequently asked questions

What is CVE-2018-7639?: CVE-2018-7639 is a high-severity vulnerability in Cimg, classified under Out-of-bounds Read. CVSS score: 7.8/10. Published 2018-03-02.
How severe is CVE-2018-7639?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2018-7639 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.