CVE-2026-56371
Description
A memory leak flaw was found in ImageMagick. Processing specially crafted TXT files with malicious texture attributes can exhaust system memory, allowing an attacker to cause a Denial of Service (DoS).
Statement
A moderate-impact memory leak in ImageMagick can cause a Denial of Service (DoS) if a user or automated system is tricked into processing a maliciously crafted TXT file.
Mitigation
If your application does not explicitly require rendering TXT files via ImageMagick, you should disable the vulnerable coder entirely. This removes the attack vector at the application layer. If ImageMagick is executed by a background service, worker queue, or web server (such as httpd or nginx), utilize systemd's control groups (cgroups) to isolate the process's memory pool. This ensures that if the leak is triggered, the Linux Out-Of-Memory (OOM) killer only terminates the offending worker rather than crashing the entire OS.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 5.3 | 5.3 | 5.3 |
| Attack Vector | Network | Network | Network |
| Attack Complexity | High | Low | Low |
| Privileges Required | None | None | None |
| User Interaction | Required | None | None |
| Scope | Unchanged | Unchanged | Unchanged |
| Confidentiality | None | None | None |
| Integrity Impact | None | None | None |
| Availability Impact | High | Low | Low |
Vector
Red Hat: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
cve.org: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Understanding the Weakness (CWE)
Availability
Technical Impact: DoS: Resource Consumption (Other); DoS: Resource Consumption (Memory); DoS: Resource Consumption (CPU)
An attacker that can influence the allocation of resources that are not properly released could deplete the available resource pool and prevent all other processes from accessing the same type of resource. Frequently-affected resources include memory, CPU, disk space, power or battery, etc.
Frequently Asked Questions
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