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ImageMagick CVE-2026-56373

| EUVDEUVD-2026-42889 MEDIUM
Use After Free (CWE-416)
2026-07-10 VulnCheck GHSA-j6f7-9c5w-9r2q
Denial Of Service Use After Free Memory Corruption Red Hat Imagemagick 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 attack vector, but AC:H due to required allocation-failure timing condition and AT:P analog; impact is availability-only with no confidentiality or meaningful integrity consequence.

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
3.7 MEDIUM
AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Red Hat
5.9 MEDIUM
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

2
Patch available
Jul 10, 2026 - 16:16 EUVD
Analysis Generated
Jul 10, 2026 - 15:53 vuln.today

DescriptionCVE.org

ImageMagick before 7.1.2-15 contains a use-after-free vulnerability in the PDB decoder that uses a stale pointer when memory allocation fails. Attackers can trigger this vulnerability by processing malicious PDB files to cause crashes or write a single zero byte to freed memory.

AnalysisAI

Use-after-free in ImageMagick's PDB decoder (all versions before 7.1.2-15) allows remote attackers supplying crafted Palm Database image files to crash the application or write a single null byte to freed heap memory. The flaw manifests specifically when memory allocation fails during PDB decoding, leaving a stale pointer that is subsequently dereferenced rather than nulled or re-validated. No public exploit or active exploitation has been identified at time of analysis; the CVSS 4.0 score of 6.3 reflects constrained exploitation conditions (AC:H, AT:P) and impact limited strictly to availability.

Technical ContextAI

ImageMagick is a widely-deployed open-source image processing suite used in web services, content pipelines, and Linux distributions. The PDB (Palm Database) format decoder contains a CWE-416 use-after-free flaw: when a heap allocation fails mid-decode, the code does not null or re-validate the now-freed pointer, allowing subsequent use of that stale reference. The attacker-observable primitives are limited - a crash (DoS) or a write of a single zero byte to freed memory - which significantly constrains exploitation beyond denial of service. Reliable code execution from a one-byte null write requires defeating heap layout controls, making the exploitation path technically complex. Affected products are identified by CPE cpe:2.3:a:imagemagick:imagemagick:*:*:*:*:*:*:*:* for versions prior to 7.1.2-15.

RemediationAI

Upgrade ImageMagick to version 7.1.2-15 or later, which resolves the stale-pointer handling in the PDB decoder; this fix version is confirmed by the GitHub Security Advisory GHSA-3j4x-rwrx-xxj9 at https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-3j4x-rwrx-xxj9. If immediate upgrade is not feasible, disable PDB format processing via ImageMagick's policy.xml configuration by adding the directive '<policy domain="coder" rights="none" pattern="PDB" />', which prevents the decoder from running entirely; this has no operational impact unless the environment genuinely handles Palm Database image files, which is uncommon in modern deployments. System package manager updates (apt, yum, dnf) should be checked for distribution-packaged ImageMagick, as downstream vendor backports may provide a fix under a different release number.

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Same weakness CWE-416 – Use After Free

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Same technique Denial Of Service

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CVE-2011-0609 HIGH POC
7.8

Vendor StatusVendor

SUSE

Severity: Moderate
Product Status
SUSE Linux Enterprise Desktop 15 SP7 SUSE Linux Enterprise High Performance Computing 15 SP7 SUSE Linux Enterprise Server 15 SP7 SUSE Linux Enterprise Server for SAP Applications 15 SP7 Fixed
SUSE Linux Enterprise Module for Desktop Applications 15 SP7 Fixed
SUSE Linux Enterprise Module for Development Tools 15 SP7 Fixed
SUSE Linux Enterprise Server 15 SP6-LTSS Fixed
SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 Fixed

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CVE-2026-56373 vulnerability details – vuln.today
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