CVE-2025-27363
HIGHCISA KEVEPSS 97th pctlDescription
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 v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploit Intelligence
Very high risk: more likely to be exploited than 97% of all known CVEs.
FreeType Out-of-Bounds Write Vulnerability
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.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Remediation due: 2025-05-27
References
- https://www.facebook.com/security/advisories/cve-2025-27363
- http://www.openwall.com/lists/oss-security/2025/03/13/1
- http://www.openwall.com/lists/oss-security/2025/03/13/11
- http://www.openwall.com/lists/oss-security/2025/03/13/12
- http://www.openwall.com/lists/oss-security/2025/03/13/2
- http://www.openwall.com/lists/oss-security/2025/03/13/3
- http://www.openwall.com/lists/oss-security/2025/03/13/8
- http://www.openwall.com/lists/oss-security/2025/03/14/1
- http://www.openwall.com/lists/oss-security/2025/03/14/2
- http://www.openwall.com/lists/oss-security/2025/03/14/3
- http://www.openwall.com/lists/oss-security/2025/03/14/4
- http://www.openwall.com/lists/oss-security/2025/05/06/3
- http://www.openwall.com/lists/oss-security/2026/04/16/5
- http://www.openwall.com/lists/oss-security/2026/04/19/3
- https://lists.debian.org/debian-lts-announce/2025/03/msg00030.html
- https://source.android.com/docs/security/bulletin/2025-05-01
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-27363
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Start freeThis product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-20.