CVE-2026-90948: Gimp: gimp: heap-based buffer overflow in ico loader via integer overflow in embedded png dimensions

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-14 · updated 2026-10-19
Weakness: CWE-787

Description

A flaw was found in GIMP's ICO file loader. When processing an ICO file containing an embedded PNG image, an integer overflow can occur during the calculation of the required buffer size. This leads to an undersized buffer being allocated, causing a heap-based buffer overflow when the decoded pixel data is written. A remote attacker could exploit this by crafting a malicious ICO file, which, when opened, could lead to arbitrary code execution or a crash.

Affected products

Red Hat Enterprise Linux 7: all versions
Red Hat Enterprise Linux 8: all versions — fixed in 8100020261015094823.4c9c024f
Red Hat Enterprise Linux 9: all versions — fixed in 2:3.0.4-4.el9_8.14

How to fix

Upgrade to a fixed version: Red Hat Enterprise Linux 8 8100020261015094823.4c9c024f; Red Hat Enterprise Linux 9 2:3.0.4-4.el9_8.14. Check the vendor advisory for mitigations.

References

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