HIGH 8.1 Microsoft PoC

CVE-2025-27363

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.

Microsoft Security Update 2025-Mar: 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.

Affected Products

References

Published: 2025-03-11 · Source: Microsoft · Feed updated: 2026-08-10
This high severity vulnerability with a CVSS score of 8.1 was published on 2025-03-11 via Microsoft. 🚨 A public proof-of-concept exploit is available on GitHub. EPSS score: 27.6% (top 2% of all CVEs by exploitation probability). Affected: cbl2 freetype 2.13.1-1 on CBL Mariner 2.0, cbl2 freetype 2.13.0-1 on CBL Mariner 2.0, cbl2 qt5-qtbase 5.12.11-16 on CBL Mariner 2.0.
vulnfeed aggregates 8893 vulnerabilities from NVD, CISA KEV, Ubuntu, Debian, Red Hat, Kubernetes, Exploit-DB, OSS-Security, GitHub and OpenStack — updated every 4 hours.