Code execution via unchecked BMP pixel copy
Published Dec 31, 2025 · Updated Dec 31, 2025
Heap-based buffer overflow in FontForge 20251009 allows remote attackers to execute code by inducing a user to open a crafted BMP file. The GUtils BMP pixel parser copies attacker-controlled pixel data into a heap buffer without validating its length. Exploitation requires user interaction and runs code with the privileges of the current user, exposing that user's data and session.
Summary
What happened
Heap-based buffer overflow in FontForge 20251009 allows remote attackers to execute code by inducing a user to open a crafted BMP file. The GUtils BMP pixel parser copies attacker-controlled pixel data into a heap buffer without validating its length. Exploitation requires user interaction and runs code with the privileges of the current user, exposing that user's data and session.
The record
- CVE
- CVE-2025-15279
- Published
- Dec 31, 2025
- Updated
- Dec 31, 2025
- Vendor
- FontForge
- Product
- FontForge
- Classifications
- CWE-122, T1203, T1204.002
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Dec 31, 2025CVE publishedPublication date reported by the CVE source.
- Dec 31, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=387146a241b36bcdf6ce229c5a3fe367ed3854a1
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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