What is CVE-2023-37837?

CVE-2023-37837 is a medium-severity vulnerability in Jpeg Libjpeg, classified under Out-of-bounds Write. CVSS score: 6.5/10. Published 2023-07-13.

How severe is CVE-2023-37837?

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

Buffer overflow in Jpeg Libjpeg

CVE-2023-37837

libjpeg commit db33a6e was discovered to contain a heap buffer overflow via LineBitmapRequester::EncodeRegion at linebitmaprequester.cpp. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted file.

Vulnerability class: Buffer Overflow

Published 2023-07-13 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.006 (46.2th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 46.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Jpeg Libjpeg

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

github.com/thorfdbg/libjpeg/issues/87 (Exploit, Patch, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2023-37837?: CVE-2023-37837 is a medium-severity vulnerability in Jpeg Libjpeg, classified under Out-of-bounds Write. CVSS score: 6.5/10. Published 2023-07-13.
How severe is CVE-2023-37837?: Medium severity. CVSS v3 base score is 6.5 out of 10.