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CVE-2026-78465— Gimp: integer overflow in pcx loader (planes=4) leads to heap overflow on 32-bit

Quick assessment

Affected
GNOME GIMP
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

GNOME GIMP是GNOME基金会的一款图像编辑软件。 GNOME GIMP存在数字错误漏洞，该漏洞源于file-pcx插件处理PCX图像文件时存在整数溢出，可能导致堆缓冲区溢出，进而导致任意代码执行或拒绝服务。

CVSS 7.0 · High EPSS 0.28% · P19

Affected Version Matrix 5

VendorProduct Version RangeStatus
GNOME GIMP any affected
Red Hat Red Hat Enterprise Linux 6 any unknown
Red Hat Red Hat Enterprise Linux 7 any unaffected
Red Hat Red Hat Enterprise Linux 8 any unaffected
Red Hat Red Hat Enterprise Linux 9 any unaffected
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I. Basic Information for CVE-2026-78465

Vulnerability Information
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Vulnerability Title
Gimp: integer overflow in pcx loader (planes=4) leads to heap overflow on 32-bit
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in the file-pcx plugin in GIMP, affecting 32-bit builds only. When processing a PCX image file, the plugin calculates memory allocation sizes based on the image dimensions and the number of color planes. If a crafted file sets the number of planes to 4 alongside sufficiently large dimensions, the calculation exceeds the 32-bit integer limit and overflows, resulting in an undersized heap-based buffer allocation. This integer overflow issue results in a heap-based buffer overflow when the plugin subsequently writes image data into the undersized buffer, causing memory corruption, potentially leading to arbitrary code execution or a denial of service.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
Source: CVE Program / CVE List V5
Vulnerability Title
GNOME GIMP 数字错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
GNOME GIMP是GNOME基金会的一款图像编辑软件。 GNOME GIMP存在数字错误漏洞，该漏洞源于file-pcx插件处理PCX图像文件时存在整数溢出，可能导致堆缓冲区溢出，进而导致任意代码执行或拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
GNOME GIMP - -
Red Hat Red Hat Enterprise Linux 6 - cpe:/o:redhat:enterprise_linux:6
Red Hat Red Hat Enterprise Linux 7 - cpe:/o:redhat:enterprise_linux:7
Red Hat Red Hat Enterprise Linux 8 - cpe:/o:redhat:enterprise_linux:8
Red Hat Red Hat Enterprise Linux 9 - cpe:/o:redhat:enterprise_linux:9

II. Public POCs for CVE-2026-78465

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III. Intelligence Information for CVE-2026-78465

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Patches & Fixes for CVE-2026-78465 (1)

Vendor Advisories for CVE-2026-78465 (2)

IV. Related Vulnerabilities

Same product: GIMP
Same vendor: GNOME
Same weakness: CWE-190

V. Comments for CVE-2026-78465

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