What is CVE-2023-36239?

CVE-2023-36239 is a high-severity vulnerability in Libming, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.8/10. Published 2023-06-22.

How severe is CVE-2023-36239?

High severity. CVSS v3 base score is 8.8 out of 10.

Is CVE-2023-36239 known to be exploited?

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

Buffer overflow in Libming

CVE-2023-36239

libming listswf 0.4.7 was discovered to contain a buffer overflow in the parseSWF_DEFINEFONTINFO() function at parser.c.

Vulnerability class: Buffer Overflow

Published 2023-06-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.007 (51.5th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 51.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Libming — versions 0.4.7

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

Public proof-of-concept exploits

DiRaltvein/memory-corruption-examples

References

github.com/libming/libming/issues/273 (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2023-36239?: CVE-2023-36239 is a high-severity vulnerability in Libming, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.8/10. Published 2023-06-22.
How severe is CVE-2023-36239?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2023-36239 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.