EUVD-2026-77471
GHSA-4gcm-x544-rhh4
Severity by source
AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
File-parsing flaw requires only that the victim open a crafted file locally; no privileges, no special configuration, full impact if exploited.
Primary rating from Vendor (redhat).
CVSS VectorVendor: redhat
Lifecycle Timeline
3DescriptionCVE.org
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.
AnalysisAI
Heap-based buffer overflow in GIMP's ICO file loader allows arbitrary code execution or application crash when a user opens a specially crafted ICO file containing an embedded PNG image. The root cause is an integer overflow during buffer size calculation (CWE-787, with CWE-190 as the precipitating cause), causing an undersized heap allocation that overflows when decoded pixel data is written. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The victim must open a crafted ICO file in GIMP; exploitation is entirely contingent on this user interaction (UI:R). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H scores 7.8 and correctly reflects a local, user-interaction-dependent file-parsing flaw with full CIA impact potential. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply the RHEL errata packages for the affected RHEL 6, 7, 8, and 9 streams once published by Red Hat; check https://access.redhat.com/security/cve/CVE-2026-90948 for package update availability. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, issue urgent guidance to all GIMP users to avoid opening ICO files from untrusted sources and configure email systems to alert on ICO file attachments. …
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Same weakness CWE-787 – Out-of-bounds Write
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External POC / Exploit Code
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