CVE-2021-37220

medium

Published — · Modified —

CVSS v3

—

CVSS v2

—

VIR risk

5.5

Description

MuPDF through 1.18.1 has an out-of-bounds write because the cached color converter does not properly consider the maximum key size of a hash table. This can, for example, be seen with crafted "mutool draw" input.

Predictions

Exploit likelihood

20%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2021-37220

OS impact

OS	Version	Status	Fixed in
arch		fixed	`1.19.0-1`
debian	bookworm	fixed	`1.17.0+ds1-2`
debian	bullseye	fixed	`1.17.0+ds1-2`
debian	forky	fixed	`1.17.0+ds1-2`
debian	sid	fixed	`1.17.0+ds1-2`
debian	trixie	fixed	`1.17.0+ds1-2`

References

https://security-tracker.debian.org/tracker/CVE-2021-37220

Verify integrity in audit chain (admin only). AS-IS.