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Advisory severityLow3.3Red Hat Linux

Low [CVE-2026-56374] Denial of Service and Information Disclosure via heap buffer overflow in FTXT encoder

This low-severity Red Hat Linux advisory covers CVE-2026-56374 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.

CVE-2026-56374 Source published Source updated

VulniPulse record published Record updated

CVE-2026-56374
Affected products & platforms
Red Hat LinuxRed Hat Enterprise Linux
Open source advisory

Summary

ImageMagick before 7.1.2-19 contains a heap buffer overflow vulnerability in the FTXT encoder due to missing boundary checks when parsing ftxt:format. Remote attackers can trigger an out of bounds read by crafting malicious FTXT image files to cause denial of service or information disclosure.

A remote attacker could exploit this using a specially crafted FTXT image to cause a denial of service or disclose sensitive information. This low-impact heap buffer overflow in ImageMagick's FTXT encoder, caused by insufficient boundary checks, could lead to denial of service or information disclosure if a user opens a specially crafted FTXT file.

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-2026-56374 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-56374 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-2026-56374?

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.

Affected versions
  • < 7.1.2-19

Official advisory · high-confidence parse· fetched 11 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 11 days ago·verify at source

Mitigation checklist

Recommended fix / mitigation
  • To mitigate this, disable the vulnerable FTXT format by adding the following line to your ImageMagick security policy file (typically /etc/ImageMagick-7/policy.xml): <policy domain="coder" rights="none" pattern="FTXT" /> Applying this mitigation will immediately block ImageMagick from processing any files in the FTXT format, but requires no service restarts or downtime.

Official advisory · high-confidence parse· fetched 11 days ago·verify at source

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