Heap Out-of-Bounds Vulnerability in GIMP Affecting Image Processing
CVE-2026-112257

7.8HIGH

Key Information:

Vendor

Red Hat
Status
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Vendor
CVE Published:
19 October 2026

What is CVE-2026-112257?

A security flaw exists within GIMP's PSD thumbnail resource loader, which performs a BGR-to-RGB channel swap using a fixed 3-byte stride. This implementation fails to verify the color format of the JPEG thumbnail, allowing a specially crafted grayscale PSD thumbnail to trigger a heap out-of-bounds read and write during the processing of the image file. This can result in application crashes and potentially enable arbitrary code execution when a user opens or browses the affected file.

References

https://access.redhat.com/security/cve/CVE-2026-112257
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2555574
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank Alexey Khairov (codem4ster), Konstantin Talgarenko (Marcusov), and Nikolay Kravtsov (Kolya080808) for reporting this issue.
.