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ImageMagick CVE-2026-56368

| EUVDEUVD-2026-38755 MEDIUM
Memory Leak (CWE-401)
2026-06-24 VulnCheck
Denial Of Service 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 with no authentication, but high complexity and specific coder conditions required; availability-only impact from gradual heap exhaustion.

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
5.3 MEDIUM
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Red Hat
3.7 LOW
qualitative

Primary rating from Vendor (VulnCheck).

CVSS VectorVendor: VulnCheck

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

3
Patch available
Jun 24, 2026 - 13:01 EUVD
Source Code Evidence Fetched
Jun 24, 2026 - 12:25 vuln.today
Analysis Generated
Jun 24, 2026 - 12:25 vuln.today

DescriptionCVE.org

ImageMagick before 7.1.2-15 contains a memory leak vulnerability in multiple coders that write raw pixel data where allocated objects are not properly freed. Attackers can trigger this leak by processing specially crafted images, causing memory exhaustion and denial of service.

AnalysisAI

Memory exhaustion via unfreed heap allocations in ImageMagick before 7.1.2-15 enables remote denial of service against services that process untrusted images through the affected raw-pixel-data coders. The flaw (CWE-401) causes 160-byte objects to accumulate on the heap with each crafted image processed, progressively starving the host process of memory. No public exploit code has been identified at time of analysis; the CVSS 4.0 score of 6.3 reflects network reachability offset by high attack complexity and partial attack requirements, limiting realistic mass exploitation.

Technical ContextAI

ImageMagick is a modular image processing suite where format-specific 'coders' handle encoding and decoding of each image type. The affected coders are those responsible for writing raw pixel data - when invoked, they allocate heap objects (confirmed at 160 bytes per allocation per the GHSA leak trace from AddressSanitizer output) that are never released, violating CWE-401 (Missing Release of Memory after Effective Lifetime). The CPE cpe:2.3:a:imagemagick:imagemagick:*:*:*:*:*:*:*:* covers all ImageMagick versions before the fix. The .NET wrapper library Magick.NET bundles ImageMagick and is independently affected across four NuGet packages: Magick.NET-Q16-AnyCPU, Magick.NET-Q16-HDRI-AnyCPU, Magick.NET-Q16-HDRI-OpenMP-arm64, and Magick.NET-Q16-HDRI-OpenMP-x64.

RemediationAI

Upgrade ImageMagick to version 7.1.2-15 or later; the upstream fix is confirmed at commit fe0a49a58ac5b7a18ff2618b6207dcad71123e43 (https://github.com/ImageMagick/ImageMagick/commit/fe0a49a58ac5b7a18ff2618b6207dcad71123e43) per the GHSA advisory (https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-wfx3-6g53-9fgc). For .NET applications, upgrade Magick.NET-Q16-AnyCPU, Magick.NET-Q16-HDRI-AnyCPU, Magick.NET-Q16-HDRI-OpenMP-arm64, and Magick.NET-Q16-HDRI-OpenMP-x64 to version 14.10.3 or later via NuGet. If immediate patching is not feasible, apply these compensating controls: enforce per-process memory limits (e.g., ulimit -v or container memory caps) on ImageMagick worker processes to bound leak accumulation - note this may cause earlier OOM kills rather than preventing the leak; run ImageMagick in short-lived worker processes or containers that restart after each job batch, preventing leak accumulation across sessions; and implement strict image file-size and format allowlisting at the upload boundary to reduce the surface of coder invocations that reach the vulnerable paths, though this may break legitimate image processing workflows.

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Same weakness CWE-401 – Memory Leak

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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-2026-56368 vulnerability details – vuln.today
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