A flaw was found in dmg2img through 20170502.

published 2021-05-26 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-19452

cvss: 7.1; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.0%; EPSS 1.0% chance of exploitation in 30 days, percentile 61%
public exploits: 0; none known

A flaw was found in dmg2img through 20170502. fill_mishblk() does not check the length of the read buffer, and copy 0xCC bytes from it. The length of the buffer is controlled by an attacker. By providing a length smaller than 0xCC, memcpy reaches out of the malloc'ed bound. This possibly leads to memory layout information leaking in the data. This might be used in a chain of vulnerability in order to reach code execution.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-32614 updated 2026-03-27 cvss 4.3

dmg2img: OOB read in memcpy() for up to 204 bytes in fill_mishblk()

Red Hat All currently supported Red Hat products
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.96% chance of exploitation in the next 30 days, higher than 61% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	7.1	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
NVD	2.0	5.8	AV:N/AC:M/Au:N/C:P/I:N/A:P

Affected products

n/a dmg2img

Classification

Weakness

CWE-125 Out-of-bounds Read

References

bugzilla.redhat.com /show_bug.cgi?id=1959911
issue-tracking, third-party-advisory

Sources

CVE List CVE-2021-32614
NVD CVE-2021-32614

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary