CVE-2025-27363

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.

Scoring

• CVSS: 8.1 (HIGH, 3.1)
• EPSS exploitation probability: Not yet available
• EPSS percentile: Not yet available

CISA KEV status

• Added to KEV: 2025-05-06
• Remediation due date: 2025-05-27
• Known ransomware campaign use: Unknown

Weakness types (CWE)

• CWE-787

References

• https://www.facebook.com/security/advisories/cve-2025-27363
• http://www.openwall.com/lists/oss-security/2025/03/13/1
• http://www.openwall.com/lists/oss-security/2025/03/13/11
• http://www.openwall.com/lists/oss-security/2025/03/13/12
• http://www.openwall.com/lists/oss-security/2025/03/13/2
• http://www.openwall.com/lists/oss-security/2025/03/13/3
• http://www.openwall.com/lists/oss-security/2025/03/13/8
• http://www.openwall.com/lists/oss-security/2025/03/14/1
• http://www.openwall.com/lists/oss-security/2025/03/14/2
• http://www.openwall.com/lists/oss-security/2025/03/14/3

More from FreeType

• No other tracked CVEs for this vendor yet.