High
Security advisory
A flaw was found in ImageMagick in versions 7.0.11, where an integer overflow in WriteTHUMBNAILImage of coders/thumbnail.c may trigger undefined behavior via a crafted image file that is submitted by an attacker and processed by an application using ImageMagick. The highest threat from this vulnerability is to system availability.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2021-20312
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 04:15 UTC · Revision 1
Source evidence
A flaw was found in ImageMagick in versions 7.0.11, where an integer overflow in WriteTHUMBNAILImage of coders/thumbnail.c may trigger undefined behavior via a crafted image file that is submitted by an attacker and processed by an application using ImageMagick. The highest threat from this vulnerability is to system availability.
osv:CVE-2021-20312
Complete source record
{
"id": "07c251d6ae2c7ab5a51d4e45e9f5bfd130b48fef2729970d058447708d3ff6af",
"url": "https://osv.dev/vulnerability/CVE-2021-20312",
"method": "structured",
"payload": {
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"title": "CVE-2021-20312",
"summary": "A flaw was found in ImageMagick in versions 7.0.11, where an integer overflow in WriteTHUMBNAILImage of coders/thumbnail.c may trigger undefined behavior via a crafted image file that is submitted by an attacker and processed by an application using ImageMagick. The highest threat from this vulnerability is to system availability.",
"evidence": "osv:CVE-2021-20312",
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"modified": "2026-10-24T10:30:15.993299635Z",
"provider": "osv",
"references": [
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"https://lists.debian.org/debian-lts-announce/2021/06/msg00000.html",
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}