CVE-2026-66757
Gimp: signed integer overflow in file-sgi (sgi-lib) causes the plugin to crash on rle sgi images
A flaw was found in the file-sgi plugin in GIMP. When processing an RLE-compressed SGI image, the plugin allocates memory for a row table. The image header dimensions (ysize and zsize) are read as 16-bit unsigned integers. If a crafted file sets both dimensions to their maximum value (65535), the multiplication ysize * zsize overflows the standard 32-bit int boundary before being passed to calloc. This integer overflow issue results in undefined behavior, aborting the plugin and causing a denial of service.
Fixes and workarounds
Workaround
To mitigate this vulnerability, do not open SGI files from untrusted sources with GIMP.
Source: CNA: redhatAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| GIMP GNOME gimp
https://gitlab.gnome.org/GNOME/gimp |
Range not reported
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 6 Red Hat gimp
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: unknown |
CNA: redhat |
| Red Hat Enterprise Linux 7 Red Hat gimp
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 8 Red Hat gimp:2.8/gimp
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 9 Red Hat gimp
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: affected |
CNA: redhat |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 5.5 medium |
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H | CNA: redhat |
Exploit evidence
- https://gitlab.gnome.org/GNOME/gimp/-/work_items/16494
exploit · ADP: CISA-ADP
References
- https://access.redhat.com/security/cve/CVE-2026-66757CNA: redhat · vdb-entry, x_refsource_REDHAT
- https://bugzilla.redhat.com/show_bug.cgi?id=2507465CNA: redhat · issue-tracking, x_refsource_REDHAT
- https://gitlab.gnome.org/GNOME/gimp/-/work_items/16494CNA: redhat
- https://gitlab.gnome.org/GNOME/gimp/-/work_items/16494ADP: CISA-ADP · exploit
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