CVE-2026-66758Gimp: integer overflow in file-fits plugin causes a heap-based buffer overflow on crafted fits images
Updated under an hour ago ()
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It affects GNOME GIMP and 4 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-190
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- redhat
- NVD analysis
- Modified
- Record last updated
- Oct 12, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
GNOME GIMP gnome:gimp (from the name) | All versions | CNA record |
Red Hat Red Hat Enterprise Linux 8 redhat:enterprise_linux | from 8100020260824165450.4c9c024f not affected | CNA record |
from 2:2.99.8-4.el9_4.19 not affected | CNA record | |
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support redhat:rhel_eus | from 2:2.99.8-4.el9_6.20 not affected | CNA record |
gimp gimp gimp:gimp | 3.0.8; 3.2.4 | NVD |
redhat enterprise_linux redhat:enterprise_linux | 6.0; 7.0; 8.0; 9.0 | NVD |
References
- https://access.redhat.com/errata/RHSA-2026:50817vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:62507vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:73768vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:80509vendor-advisory, x-refsource-redhat
- https://access.redhat.com/security/cve/CVE-2026-66758vdb-entry, x-refsource-redhat
- https://bugzilla.redhat.com/show_bug.cgi?id=2507475issue-tracking, x-refsource-redhat
- https://gitlab.gnome.org/GNOME/gimp/-/issues/16528
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.