A flaw was found in ImageMagick in versions before 7.0.11 and before 6.9.12, where a…
Priority LOW 37CWE-369Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Will not fix Red Hat: no fix planned
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-369.
Summary
A flaw was found in ImageMagick in versions before 7.0.11 and before 6.9.12, where a division by zero in WaveImage() of MagickCore/visual-effects.c may trigger undefined behavior via a crafted image file submitted to an application using ImageMagick. The highest threat from this vulnerability is to system availability.
Why it matters now
EPSS 0.02315 83rd percentileScored 2026-11-07
Fix Will not fix Red Hat: no fix planned
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | ImagemMagick | ImageMagick 7.0.11, ImageMagick 6.9.12 | — | No fix listed | CNA |
- ImagemMagick Vendor— Affected ImageMagick 7.0.11, ImageMagick 6.9.12 Fixed in — No fix listed CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:imagemagick:imagemagick:*:*:*:*:*:*:*:* | before 6.9.12; 7.0.0-0 to before 7.0.11-0 | Vulnerable | ImageMagick |
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Debian |
- cpe:2.3:a:imagemagick:imagemagick:*:*:*:*:*:*:*:* Versions before 6.9.12; 7.0.0-0 to before 7.0.11-0 Vulnerable ·ImageMagick
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
Timeline
- 2026-10-02 Threatist record created from CVE-2021-20309
- 2026-10-03 Alias added: GHSA-vfcg-3f47-8mgm
References
Sources
- CVE-2021-20309 · CVE Program
- CVE-2021-20309 · NVD
- FIRST EPSS
- GHSA-vfcg-3f47-8mgm · GitHub Advisory Database · CC BY 4.0
- CVE-2021-20309 · Red Hat security data · CC BY 4.0
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