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.
CISA Known Exploited Vulnerability
Date added 2025-05-06 | Due date 2025-05-27
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Problem types
Out-of-bounds Write (CWE-787)
Product status
0.0.0 (semver)
References
source.android.com/docs/security/bulletin/2025-05-01
www.cisa.gov/...erabilities-catalog?field_cve=CVE-2025-27363
www.openwall.com/lists/oss-security/2025/03/13/1
www.openwall.com/lists/oss-security/2025/03/13/2
www.openwall.com/lists/oss-security/2025/03/13/3
www.openwall.com/lists/oss-security/2025/03/13/8
www.openwall.com/lists/oss-security/2025/03/13/11
www.openwall.com/lists/oss-security/2025/03/13/12
www.openwall.com/lists/oss-security/2025/03/14/1
www.openwall.com/lists/oss-security/2025/03/14/2
www.openwall.com/lists/oss-security/2025/03/14/3
www.openwall.com/lists/oss-security/2025/03/14/4
lists.debian.org/debian-lts-announce/2025/03/msg00030.html
www.openwall.com/lists/oss-security/2025/05/06/3
www.facebook.com/security/advisories/cve-2025-27363
