What is CVE-2023-29596?

CVE-2023-29596 is a high-severity vulnerability in Cmix Project, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.8/10. Published 2023-04-26.

How severe is CVE-2023-29596?

High severity. CVSS v3 base score is 7.8 out of 10.

Is CVE-2023-29596 known to be exploited?

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

Buffer overflow in Cmix Project

CVE-2023-29596

Buffer Overflow vulnerability found in ByronKnoll Cmix v.19 allows an attacker to execute arbitrary code and cause a denial of service via the paq8 function.

Vulnerability class: Buffer Overflow

Published 2023-04-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.003 (23.7th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 23.7% 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

Cmix Project — versions 19

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/byronknoll/cmix/issues/54 (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2023-29596?: CVE-2023-29596 is a high-severity vulnerability in Cmix Project, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.8/10. Published 2023-04-26.
How severe is CVE-2023-29596?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2023-29596 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.