What is CVE-2021-37529?

CVE-2021-37529 is a medium-severity vulnerability in Fig2dev Project, classified under Double Free. CVSS score: 5.5/10. Published 2022-01-12.

How severe is CVE-2021-37529?

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

Is CVE-2021-37529 known to be exploited?

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

Double Free in Fig2dev Project

CVE-2021-37529

A double-free vulnerability exists in fig2dev through 3.28a is affected by: via the free_stream function in readpics.c, which could cause a denial of service (context-dependent).

Vulnerability class: Double Free

Published 2022-01-12 · 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: 0.007 (53.1th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 53.1% 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

Fig2dev Project
Debian Linux — versions 9.0, 10.0, 11.0

Weakness classification (CWE)

CWE-415 — Double Free

Public proof-of-concept exploits

s-cube-xmu/Bug_

References

sourceforge.net/p/mcj/tickets/125/ (Exploit, Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-37529?: CVE-2021-37529 is a medium-severity vulnerability in Fig2dev Project, classified under Double Free. CVSS score: 5.5/10. Published 2022-01-12.
How severe is CVE-2021-37529?: Medium severity. CVSS v3 base score is 5.5 out of 10.
Is CVE-2021-37529 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.