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Memory leak in ImageMagick MSL decoder enables denial of service

Priority LOW 28CWE-401Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Attack requirements
Present
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · Low
Fix status
Partial Red Hat: 2 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-401.

Summary

ImageMagick before 6.9.13-58 and from 7.0.0-0 before 7.1.2-33 contains a memory leak in its MSL decoder. The decoder fails to release allocated memory when it processes a crafted MSL image, which is CWE-401. A remote attacker who can supply a crafted MSL file for processing can repeatedly leak memory, exhausting resources and causing denial of service without authentication or user interaction.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

ImageMagick before 6.9.13-58 and 7.x before 7.1.2-33 contains a memory leak in the MSL decoder that fails to release allocated memory when processing a crafted MSL image. Attackers can supply crafted MSL files for processing to repeatedly leak memory, causing resource exhaustion and denial of service.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00273 19th percentileScored 2026-11-07
Fix Partial ImageMagick (ImageMagick): 7.1.2-33, 6.9.13-58Red Hat: 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ImageMagickImageMagick7.0.0-0 to before 7.1.2-337.1.2-33Patch availableCNA
ImageMagickImageMagickbefore 6.9.13-586.9.13-58Patch availableCNA
  • ImageMagick VendorImageMagick Affected 7.0.0-0 to before 7.1.2-33 Fixed in 7.1.2-33 Patch available CNA
  • ImageMagick VendorImageMagick Affected before 6.9.13-58 Fixed in 6.9.13-58 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:imagemagick:imagemagick:*:*:*:*:*:*:*:*before 6.9.13-58; 7.0.0-0 to before 7.1.2-33VulnerableImageMagick
  • cpe:2.3:a:imagemagick:imagemagick:*:*:*:*:*:*:*:* Versions before 6.9.13-58; 7.0.0-0 to before 7.1.2-33 Vulnerable ·ImageMagick

Remediation

Upgrade ImageMagick 6 to 6.9.13-58 and ImageMagick 7 to 7.1.2-33. Red Hat lists Red Hat Enterprise Linux 6 as affected with no fix planned and Red Hat Enterprise Linux 7 as affected with no fix available.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA ImageMagick (ImageMagick) Fixed in 7.1.2-33
  • Fix · CNA ImageMagick (ImageMagick) Fixed in 6.9.13-58

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    ImageMagick 7.1.2-33

    20 records Highest priority Priority LOW 20 LOW

    Other records, highest priority first

    • TI-2026-80173 Memory leak in ImageMagick via crafted XMP profilePriority LOW 36
    • TI-2026-80172 Memory leak in ImageMagick XML parsing at nesting depth limitPriority LOW 36
    • TI-2026-80170 Memory leak in ImageMagick MAT decoder error pathPriority LOW 36
  • Release ·

    ImageMagick 6.9.13-58

    14 records Highest priority Priority LOW 14 LOW

    Other records, highest priority first

    • TI-2026-80173 Memory leak in ImageMagick via crafted XMP profilePriority LOW 36
    • TI-2026-80172 Memory leak in ImageMagick XML parsing at nesting depth limitPriority LOW 36
    • TI-2026-80167 Stack buffer overflow in ImageMagick via bzip2 compressed imagesPriority LOW 32

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 7AffectedNo fix yet: Fix deferred

Timeline

  1. 2026-10-25 Threatist record created from CVE-2026-116146
  2. 2026-10-25 Affected versions changed · Red Hat
  3. 2026-10-25 CVSS score added · Red Hat
  4. 2026-10-26 CISA SSVC decision points changed
  5. 2026-10-26 Priority changed: MEDIUM → LOW
  6. 2026-10-27 Alias added: GHSA-9jrm-69jx-2rjr

References

  • TI-2016-03144 The (1) EPHEMERAL, (2) HTTPS, (3) MVG, (4) MSL, (5) TEXT, (6) SHOW, (7) WIN, and (8) PLT… KEVCVSS 3.1HIGH 8.4
  • TI-2023-16996 Improper input validation in ImageMagick CVSS 3.1CRITICAL 9.8
  • TI-2016-03148 The (1) HTTP and (2) FTP coders in ImageMagick before 6.9.3-10 and 7.x before 7.0.1-1… KEVCVSS 3.1MEDIUM 5.5
  • TI-2016-03145 The EPHEMERAL coder in ImageMagick before 6.9.3-10 and 7.x before 7.0.1-1 allows remote… KEVCVSS 3.1MEDIUM 5.5
  • TI-2025-35690 ImageMagick BlobStream Forward-Seek Under-Allocation CVSS 3.1CRITICAL 9.8
  • TI-2025-33094 ImageMagick has Stack Buffer Overflow in image.c CVSS 3.1CRITICAL 9.8
See all 888 →

Sources