What is CVE-2022-43038?

CVE-2022-43038 is a medium-severity vulnerability in Axiosys Bento4, classified under Out-of-bounds Write. CVSS score: 6.5/10. Published 2022-10-19.

How severe is CVE-2022-43038?

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

Is CVE-2022-43038 known to be exploited?

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

Buffer overflow in Axiosys Bento4

CVE-2022-43038

Bento4 v1.6.0-639 was discovered to contain a heap overflow via the AP4_BitReader::ReadCache() function in mp42ts.

Vulnerability class: Buffer Overflow

Published 2022-10-19 · 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 (48.0th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 48.0% 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

Axiosys Bento4 — versions 1.6.0-639

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

Public proof-of-concept exploits

References

github.com/axiomatic-systems/Bento4/issues/787 (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2022-43038?: CVE-2022-43038 is a medium-severity vulnerability in Axiosys Bento4, classified under Out-of-bounds Write. CVSS score: 6.5/10. Published 2022-10-19.
How severe is CVE-2022-43038?: Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2022-43038 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.