# CVE-2025-27363: FreeType Out-of-Bounds Write Vulnerability

> CVE-2025-27363: FreeType Out-of-Bounds Write Vulnerability. CVSS 8.1 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2025-27363
Last updated: 2026-06-17T09:03:27Z

- Published: 2025-03-11 13:28 UTC · Updated: 2026-06-17 09:03 UTC · Assigner: facebook
- CVSS: 8.1 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C/CR:H/IR:H/AR:H/MAV:N/MAC:L/MPR:N/MUI:N/MS:U/MC:H/MI:H/MA:H
- EPSS: 27.8%, 98th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2025-05-06, federal due date 2025-05-27, ransomware use: Unknown

## 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 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.

## Affected vendors and products

- FreeType: FreeType

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2025-27363)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2025-27363)
- [https://www.facebook.com/security/advisories/cve-2025-27363](https://www.facebook.com/security/advisories/cve-2025-27363)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2025-27363 · Markdown: https://rewindex.com/cve/CVE-2025-27363.md · JSON: https://rewindex.com/api/v1/cves/CVE-2025-27363 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:13:39.717Z