What is CVE-2023-37644?

CVE-2023-37644 is a medium-severity vulnerability in Swftools, classified under Out-of-bounds Write. CVSS score: 5.5/10. Published 2024-01-11.

How severe is CVE-2023-37644?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Buffer overflow in Swftools

CVE-2023-37644

SWFTools 0.9.2 772e55a allows attackers to trigger a large memory-allocation attempt via a crafted document, as demonstrated by pdf2swf. This occurs in png_read_chunk in lib/png.c.

Vulnerability class: Buffer Overflow

Published 2024-01-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.003 (17.4th percentile), scored 2026-10-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 17th percentile — 17.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Swftools — versions 0.9.2

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

github.com/matthiaskramm/swftools/issues/202 (Exploit, Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2023-37644?: CVE-2023-37644 is a medium-severity vulnerability in Swftools, classified under Out-of-bounds Write. CVSS score: 5.5/10. Published 2024-01-11.
How severe is CVE-2023-37644?: Medium severity. CVSS v3 base score is 5.5 out of 10.