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

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-66758

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-66758

GIMP

Source reference: /containers/cna/affected/0/product

Affected versions
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Prerequisites
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Red Hat Enterprise Linux 8

Source reference: /containers/cna/affected/1/product

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Prerequisites
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Red Hat Enterprise Linux 9

Source reference: /containers/cna/affected/2/product

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Fixed versions
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Prerequisites
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Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Source reference: /containers/cna/affected/3/product

Affected versions
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Fixed versions
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Prerequisites
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Red Hat Enterprise Linux 9.6 Extended Update Support

Source reference: /containers/cna/affected/4/product

Affected versions
Not stated in this record
Fixed versions
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Prerequisites
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Red Hat Enterprise Linux 6

Source reference: /containers/cna/affected/5/product

Affected versions
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Fixed versions
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Prerequisites
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Red Hat Enterprise Linux 7

Source reference: /containers/cna/affected/6/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "vendor": "GNOME",
    "product": "GIMP",
    "packageName": "gimp",
    "collectionURL": "https://gitlab.gnome.org/GNOME/gimp",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:enterprise_linux:8::appstream"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 8",
    "versions": [
      {
        "status": "unaffected",
        "version": "8100020260824165450.4c9c024f",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "gimp:2.8",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:enterprise_linux:9::appstream"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 9",
    "versions": [
      {
        "status": "unaffected",
        "version": "2:3.0.4-4.el9_8.9",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "gimp",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:rhel_e4s:9.4::appstream"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions",
    "versions": [
      {
        "status": "unaffected",
        "version": "2:2.99.8-4.el9_4.19",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "gimp",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:rhel_eus:9.6::appstream"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 9.6 Extended Update Support",
    "versions": [
      {
        "status": "unaffected",
        "version": "2:2.99.8-4.el9_6.20",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "gimp",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:6"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 6",
    "packageName": "gimp",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:7"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 7",
    "packageName": "gimp",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-66758

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#17032 · Revision 1
Added to Heist Feed
Publisher date
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