Low [CVE-2026-61866] Memory leak in JNG encoder can lead to denial of service
This low-severity Red Hat Linux advisory covers CVE-2026-61866 affecting Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat package: imagemagick.
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Summary
ImageMagick before 7.1.2-26 contains a memory leak vulnerability in the JNG encoder when a blob cannot be opened. Attackers can trigger the memory leak by providing malformed JNG files that fail blob operations, causing resource exhaustion.
A flaw was found in ImageMagick. A memory leak vulnerability exists in the JNG (JPEG Network Graphics) encoder when the application fails to open a blob.
A remote attacker could exploit this by providing specially crafted malformed JNG files, leading to resource exhaustion and a denial of service (DoS) for the affected system. Red Hat Enterprise Linux ships ImageMagick in RHEL 6 ELS and RHEL 7 ELS.
This flaw has been rated as having a Low security impact and is not currently planned to be addressed in future updates of those products. For additional information, refer to the Issue Severity Classification:.
Red Hat severity: Low — CVSS 2.9 (CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L). Weakness: CWE-772.
Affected Red Hat products: Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7. Red Hat does not currently list a fixing RHSA for this CVE.
Affected products named by the advisory: Red Hat package: imagemagick.
- < 7.1.2-26
Official advisory · high-confidence parse· fetched 5 days ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 5 days ago·verify at source
Mitigation checklist
- Do not process untrusted image files with ImageMagick. The JNG coder can be disabled in ImageMagick's policy.xml if not needed: `<policy domain="coder" rights="none" pattern="JNG"/>`. Upgrade to ImageMagick 7.1.2-26 or 6.9.13-51 mitigates the issue.
Official advisory · high-confidence parse· fetched 5 days ago·verify at source
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