Medium severity5.5NVD Advisory· Published Jul 21, 2021· Updated Jun 17, 2026

CVE-2021-37220

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Artifex/Mupdf
cpe:2.3:a:artifex:mupdf:*:*:*:*:*:*:*:*
Range: <=1.18.1
Fedoraproject/Fedora
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
MuPDF/MuPDFdescription
MuPDF/MuPDFllm-fuzzy
Range: <=1.18.1

Patches

Vulnerability mechanics

References

bugs.ghostscript.com/show_bug.cginvdExploitVendor Advisory
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TKRMREIYUBGG2GV73CU7BJNW2Q34IP23/nvd

News mentions

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cvss	0.358
epss	0.001
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000