What is CVE-2023-31976?

CVE-2023-31976 is a high-severity vulnerability in Libming, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2023-05-09.

How severe is CVE-2023-31976?

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

Is CVE-2023-31976 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-2023-31976

libming v0.4.8 was discovered to contain a stack buffer overflow via the function makeswf_preprocess at /util/makeswf_utils.c.

Vulnerability class: Buffer Overflow

Published 2023-05-09 · 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 (51.4th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 51.4% 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 0.4.8

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

Public proof-of-concept exploits

DiRaltvein/memory-corruption-examples

References

github.com/libming/libming/issues/265 (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2023-31976?: CVE-2023-31976 is a high-severity vulnerability in Libming, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2023-05-09.
How severe is CVE-2023-31976?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2023-31976 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.