CVEs / CVE-2025-27363

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

Known exploited in the CISA KEV catalog since 6 May 2025
high 8.1 CVSS 3.1 (NVD)
EPSS 27.7% chance of exploitation in the next 30 days, higher than 98% of CVEs (30 Oct 2026)
Last changed at its sources 28 Oct 2026

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Summary

FreeType contains an out-of-bounds write vulnerability when attempting to parse font subglyph structures related to TrueType GX and variable font files that may allow for arbitrary code execution.
CISA, Known Exploited Vulnerabilities catalog

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.
The CVE record, via NVD · published 11 Mar 2025 · NVD status: Analyzed

Affected and fixed versions

As stated by the CVE record (from the CNA)
Product	Affected	Fixed in
FreeType FreeType	from 0.0.0, up to and including 2.13.0	—

Exploitation

In CISA KEV since	6 May 2025
Due date for US federal agencies	27 May 2025
Used in ransomware campaigns	Unknown
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.

Severity

CVSS 3.1	8.1 high `CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H` Scored by NVD
Weakness	CWE-787

References

CVE-2025-27363 on NVD
CVE-2025-27363 in the CISA KEV catalog
https://source.android.com/docs/security/bulletin/2025-05-01 (cited by CISA)
CVE-2025-27363 on OSV
https://www.facebook.com/security/advisories/cve-2025-27363 Third Party Advisory
http://www.openwall.com/lists/oss-security/2025/03/13/1 Mailing List
http://www.openwall.com/lists/oss-security/2025/03/13/11 Mailing List
http://www.openwall.com/lists/oss-security/2025/03/13/12 Mailing List
http://www.openwall.com/lists/oss-security/2025/03/13/2 Mailing List
http://www.openwall.com/lists/oss-security/2025/03/13/3 Mailing List
http://www.openwall.com/lists/oss-security/2025/03/13/8 Mailing List
http://www.openwall.com/lists/oss-security/2025/03/14/1 Mailing List
http://www.openwall.com/lists/oss-security/2025/03/14/2 Mailing List
http://www.openwall.com/lists/oss-security/2025/03/14/3 Mailing List
http://www.openwall.com/lists/oss-security/2025/03/14/4 Mailing List
http://www.openwall.com/lists/oss-security/2025/05/06/3 Mailing List
http://www.openwall.com/lists/oss-security/2026/04/16/5 Mailing List
http://www.openwall.com/lists/oss-security/2026/04/19/3 Mailing List
https://lists.debian.org/debian-lts-announce/2025/03/msg00030.html Mailing List
https://source.android.com/docs/security/bulletin/2025-05-01 Third Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-27363 US Government Resource

Sources

Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.

This product uses data from the NVD API but is not endorsed or certified by the NVD.