CVE-2025-27363

HIGH8.1

CISA KEV

Published 2025-03-11 · Updated 2026-06-17 · Source cve-assign@fb.com

Summary

CVE-2025-27363 is a high-severity (CVSS 8.1) vulnerability in FreeType FreeType. CISA added it to the Known Exploited Vulnerabilities catalog on May 6, 2025, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by May 27, 2025. CISA does not currently list it as used in ransomware campaigns.

All 1 known-exploited FreeType vulnerabilities →

Description

An out of bounds write exists in FreeType versions 2.13.0 and below (newer versions of FreeType are not vulnerable) when attempting to parse font subglyph structures related to TrueType GX and variable font files. The vulnerable code assigns a signed short value to an unsigned long and then adds a static value causing it to wrap around and allocate too small of a heap buffer. The code then writes up to 6 signed long integers out of bounds relative to this buffer. This may result in arbitrary code execution. This vulnerability may have been exploited in the wild.

CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE-787

CISA Known-Exploited Vulnerability

Product: FreeType — FreeType

Name: FreeType Out-of-Bounds Write Vulnerability

Date added: 2025-05-06 · Due: 2025-05-27

Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

References

View on NVD

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