Low [CVE-2026-86421] Denial of Service via memory leak in MSL decoder
This low-severity Red Hat Linux advisory covers CVE-2026-86421 affecting Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat package: imagemagick.
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Summary
A flaw was found in ImageMagick. A remote attacker could exploit this vulnerability by providing a specially crafted MSL (Magick Scripting Language) image.
This triggers memory allocation without proper deallocation, leading to memory exhaustion. Successful exploitation can result in a denial of service (DoS) for the affected system.
Red Hat has evaluated this issue and determined it is of Low severity. No fix is currently planned for the affected RHEL Extended Life Support versions.
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.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 2 hours 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 2 hours ago·verify at source
Mitigation checklist
- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
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