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Vulnerability · Published Jul 27, 2026 · Assigned by redhat

CVE-2026-66758Gimp: integer overflow in file-fits plugin causes a heap-based buffer overflow on crafted fits images

High 7.8

In plain English

A high-severity integer overflow in GIMP from GNOME. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 22% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.3%top 77.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

A flaw was found in the file-fits plugin in GIMP. When processing a FITS image file, the plugin calculates memory allocation sizes using signed 32-bit integers for width and height. If a crafted file sets both values to large values, their product exceeds 2^31 and overflows, resulting in an undersized heap-based buffer allocation. This integer overflow issue results in a heap-based buffer overflow when cfitsio subsequently writes a full row of pixels in the buffer, causing memory corruption, potentially leading to arbitrary code execution or a denial of service.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8gimp2:2.8.22-26.module_el8.10.0+4267+35168c80.8ALSA-2026:62507
AlmaLinux:9gimp2:3.0.4-4.el9_8.9ALSA-2026:50817
AlmaLinux:8gimp-devel2:2.8.22-26.module_el8.10.0+4267+35168c80.8ALSA-2026:62507
AlmaLinux:8gimp-devel-tools2:2.8.22-26.module_el8.10.0+4267+35168c80.8ALSA-2026:62507
AlmaLinux:8gimp-libs2:2.8.22-26.module_el8.10.0+4267+35168c80.8ALSA-2026:62507
AlmaLinux:9gimp-libs2:3.0.4-4.el9_8.9ALSA-2026:50817
AlmaLinux:8pygobject22.28.7-5.module_el8.10.0+4267+35168c80ALSA-2026:62507
AlmaLinux:8pygobject2-codegen2.28.7-5.module_el8.10.0+4267+35168c80ALSA-2026:62507
AlmaLinux:8pygobject2-devel2.28.7-5.module_el8.10.0+4267+35168c80ALSA-2026:62507
AlmaLinux:8pygobject2-doc2.28.7-5.module_el8.10.0+4267+35168c80ALSA-2026:62507
AlmaLinux:8pygtk22.24.0-25.module_el8.9.0+3725+d1441900ALSA-2026:62507
AlmaLinux:8pygtk2-codegen2.24.0-25.module_el8.9.0+3725+d1441900ALSA-2026:62507
AlmaLinux:8pygtk2-devel2.24.0-25.module_el8.9.0+3725+d1441900ALSA-2026:62507
AlmaLinux:8pygtk2-doc2.24.0-25.module_el8.9.0+3725+d1441900ALSA-2026:62507
AlmaLinux:8python2-cairo1.16.3-7.module_el8.10.0+4267+35168c80ALSA-2026:62507
AlmaLinux:8python2-cairo-devel1.16.3-7.module_el8.10.0+4267+35168c80ALSA-2026:62507
Debian:12gimpno fix listedDEBIAN-CVE-2026-66758
Debian:13gimp3.0.4-3+deb13u10DEBIAN-CVE-2026-66758
Debian:14gimp3.2.6-1DEBIAN-CVE-2026-66758
Rocky Linux:8gimp2:2.8.22-26.module+el8.10.0+1998+a08ccc48.2RLSA-2026:62507
Rocky Linux:8gimp2:2.8.22-26.module+el8.10.0+40033+6fd27379.3RLSA-2026:62507
Rocky Linux:8gimp2:2.8.22-26.module+el8.10.0+40075+a21479b4.4RLSA-2026:62507
Rocky Linux:8gimp2:2.8.22-26.module+el8.10.0+1927+52edb5a0RLSA-2026:62507
Rocky Linux:8gimp2:2.8.22-26.module+el8.10.0+40181+ad0e3a65.6RLSA-2026:62507
Rocky Linux:8gimp2:2.8.22-26.module+el8.10.0+40134+eab491b1.5RLSA-2026:62507
Rocky Linux:8pygobject20:2.28.7-5.module+el8.10.0+1927+52edb5a0RLSA-2026:62507
Rocky Linux:8pygtk20:2.24.0-25.module+el8.9.0+1723+9bc93544RLSA-2026:62507
Rocky Linux:8python2-pycairo0:1.16.3-7.module+el8.10.0+1927+52edb5a0RLSA-2026:62507
Ubuntu:26.04:LTSgimpno fix listedUBUNTU-CVE-2026-66758
Ubuntu:26.10gimpno fix listedUBUNTU-CVE-2026-66758

Affected products (as reported)

VendorProductVersions
GNOME GIMP see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 9 see references
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support see references
Red Hat Red Hat Enterprise Linux 6 see references
Red Hat Red Hat Enterprise Linux 7 see references

Weakness: CWE-190 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References