Low [CVE-2026-56361] Heap buffer overflow via incorrect morphology parameters
This low-severity Red Hat Linux advisory covers CVE-2026-56361 affecting Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat package: imagemagick.
Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.
VulniPulse record published Record updated
Summary
ImageMagick before 7.1.2-19 contains an off-by-one error in morphology validation allowing out-of-bounds heap buffer reads. Attackers can trigger heap buffer overflow by providing incorrect morphology parameters causing single pixel memory access violations.
A flaw was found in ImageMagick. An attacker can exploit an off-by-one error in the morphology validation by providing incorrect morphology parameters.
This can lead to out-of-bounds heap buffer reads and heap buffer overflow, potentially causing memory access violations. This flaw in ImageMagick is rated as Low impact.
An attacker can trigger a memory access violation by submitting a maliciously crafted image. Red Hat severity: Low — CVSS 3.3 (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L).
Weakness: CWE-125. Affected Red Hat products: Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7.
Will not fix / out of support: 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.
Is CVE-2026-56361 exploited?
No exploitation is reported in the sources VulniPulse tracks: CVE-2026-56361 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.
How do I fix CVE-2026-56361?
The advisory VulniPulse tracks names no fixed release. Follow Red Hat's guidance for workarounds and updates.
Confirm against the vendor advisory before you patch.
- < 7.1.2-19
Official advisory · high-confidence parse· fetched 12 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 12 days ago·verify at source
Mitigation checklist
- To reduce exposure, avoid processing untrusted image files with ImageMagick, particularly those that may contain malformed morphology parameters. If processing untrusted content is necessary, consider implementing sandboxing mechanisms to isolate ImageMagick operations and limit the potential blast radius of any successful exploitation.
Official advisory · high-confidence parse· fetched 12 days ago·verify at source
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