Integer overflow in ImageMagick
Priority LOW 25CWE-190Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- 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-190 and the CVSS impact.
Summary
An integer overflow issue was discovered in ImageMagick's ExportIndexQuantum() function in MagickCore/quantum-export.c. Function calls to GetPixelIndex() could result in values outside the range of representable for the 'unsigned char'. When ImageMagick processes a crafted pdf file, this could lead to an undefined behaviour or a crash.
Why it matters now
EPSS 0.00389 33rd 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 |
|---|---|---|---|---|---|
| — | ImageMagick | Fixed in ImageMagick-7.0.10-57, ImageMagick6-6.9.11-57 | — | No fix listed | CNA |
- ImageMagick Vendor— Affected Fixed in ImageMagick-7.0.10-57, ImageMagick6-6.9.11-57 Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:imagemagick:imagemagick:*:*:*:*:*:*:*:* | before 6.9.11-57; 7.0.0-0 to before 7.0.10-57 | Vulnerable | ImageMagick |
- cpe:2.3:a:imagemagick:imagemagick:*:*:*:*:*:*:*:* Versions before 6.9.11-57; 7.0.0-0 to before 7.0.10-57 Vulnerable ·ImageMagick
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
Not affected: 1 product
- Red Hat Enterprise Linux 6
Timeline
- 2026-10-02 Threatist record created from CVE-2021-20224
- 2026-10-03 Alias added: GHSA-ccpc-2gr7-q87w
References
Patch 3
More Imagemagick vulnerabilities
- TI-2016-03144 The (1) EPHEMERAL, (2) HTTPS, (3) MVG, (4) MSL, (5) TEXT, (6) SHOW, (7) WIN, and (8) PLT… KEVCVSS 3.1HIGH 8.4
- TI-2023-16996 Improper input validation in ImageMagick CVSS 3.1CRITICAL 9.8
- TI-2016-03148 The (1) HTTP and (2) FTP coders in ImageMagick before 6.9.3-10 and 7.x before 7.0.1-1… KEVCVSS 3.1MEDIUM 5.5
- TI-2016-03145 The EPHEMERAL coder in ImageMagick before 6.9.3-10 and 7.x before 7.0.1-1 allows remote… KEVCVSS 3.1MEDIUM 5.5
- TI-2025-35690 ImageMagick BlobStream Forward-Seek Under-Allocation CVSS 3.1CRITICAL 9.8
- TI-2025-33094 ImageMagick has Stack Buffer Overflow in image.c CVSS 3.1CRITICAL 9.8
Sources
- CVE-2021-20224 · CVE Program
- CVE-2021-20224 · NVD
- FIRST EPSS
- GHSA-ccpc-2gr7-q87w · GitHub Advisory Database · CC BY 4.0
- CVE-2021-20224 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences