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ImageMagick CVE-2026-56376

| EUVDEUVD-2026-38440 MEDIUM
Use After Free (CWE-416)
2026-06-23 VulnCheck GHSA-8g9f-ccmr-vfvg
Use After Free Denial Of Service Memory Corruption Imagemagick Red Hat Suse
6.3
CVSS 4.0 · Vendor: VulnCheck
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Severity by source

Vendor (VulnCheck) PRIMARY
6.3 MEDIUM
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
3.7 LOW

Network-reachable via image upload, but AC:H due to required allocation failure; no auth needed; impact is availability only.

3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
4.0 AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
SUSE
6.5 MEDIUM
AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
Red Hat
3.7 LOW
qualitative

Primary rating from Vendor (VulnCheck).

CVSS VectorVendor: VulnCheck

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

3
Patch available
Jun 23, 2026 - 14:17 EUVD
Source Code Evidence Fetched
Jun 23, 2026 - 13:11 vuln.today
Analysis Generated
Jun 23, 2026 - 13:11 vuln.today

DescriptionCVE.org

ImageMagick before 7.1.2-15 and 6.9.13-40 contains a heap use-after-free in the meta coder: when memory allocation fails, a single byte is written to a stale pointer. Remote attackers can trigger it by processing specially crafted image files, causing a denial of service.

AnalysisAI

Heap use-after-free in ImageMagick's meta coder allows remote attackers to crash the process by submitting a specially crafted image file that triggers a memory allocation failure, causing a single byte write to a stale (freed) pointer. Affected versions are ImageMagick before 7.1.2-15 and 6.9.13-40, as well as Magick.NET NuGet wrapper packages before 14.10.3. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Submit crafted image via upload or URL
Delivery
ImageMagick meta coder processes file
Exploit
Heap allocation fails during meta parsing
Execution
Single byte written to freed/stale pointer
Persist
Heap use-after-free triggers crash
Impact
Image processing service denied
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Vulnerability AssessmentAI

Exploitation The vulnerability requires that the target system invokes ImageMagick's meta coder to process a specially crafted image file supplied by the attacker. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 base score of 6.3 is supported by the vector AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker submits a specially crafted image file to a web application or service that passes uploaded images to ImageMagick for processing (e.g., thumbnail generation, format conversion). The crafted file is constructed to trigger a heap allocation failure inside the meta coder path, causing ImageMagick to write a single byte to a freed heap pointer. …
Remediation Upgrade ImageMagick to version 7.1.2-15 or later on the 7.x branch, or to 6.9.13-40 or later on the 6.x branch. … Detailed patch versions, workarounds, and compensating controls in full report.
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Threat intelligence, references, and detailed analysis are available after sign-in.

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Same weakness CWE-416 – Use After Free

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Same technique Use After Free

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CVE-2015-5119 CRITICAL POC
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CVE-2014-0322 HIGH POC
8.8
CVE-2012-4792 HIGH POC
8.8
CVE-2009-4324 HIGH POC
7.8
CVE-2015-0313 CRITICAL POC
9.8
CVE-2015-5122 CRITICAL POC
9.8
CVE-2013-2551 HIGH POC
8.8
CVE-2012-4969 HIGH POC
8.1

Vendor StatusVendor

SUSE

Severity: Moderate
Product Status
openSUSE Tumbleweed Fixed
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS Affected
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS Affected
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS Affected
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS Affected

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CVE-2026-56376 vulnerability details – vuln.today
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