CVE-2025-27363

Vulnerability 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 Score

Affected Products

Related Weaknesses (CWE)

References

• https://www.facebook.com/security/advisories/cve-2025-27363Third Party Advisory
• http://www.openwall.com/lists/oss-security/2025/03/13/1Mailing List
• http://www.openwall.com/lists/oss-security/2025/03/13/11Mailing List
• http://www.openwall.com/lists/oss-security/2025/03/13/12Mailing List
• http://www.openwall.com/lists/oss-security/2025/03/13/2Mailing List
• http://www.openwall.com/lists/oss-security/2025/03/13/3Mailing List
• http://www.openwall.com/lists/oss-security/2025/03/13/8Mailing List
• http://www.openwall.com/lists/oss-security/2025/03/14/1Mailing List
• http://www.openwall.com/lists/oss-security/2025/03/14/2Mailing List
• http://www.openwall.com/lists/oss-security/2025/03/14/3Mailing List
• http://www.openwall.com/lists/oss-security/2025/03/14/4Mailing List
• http://www.openwall.com/lists/oss-security/2025/05/06/3Mailing List
• http://www.openwall.com/lists/oss-security/2026/04/16/5Mailing List
• http://www.openwall.com/lists/oss-security/2026/04/19/3Mailing List
• https://lists.debian.org/debian-lts-announce/2025/03/msg00030.htmlMailing List