CVE-2025-27363
FreeType
Published 11 Mar 2025 · updated 17 Jun 2026 · Analyzed
Exploited in the wild
CISA added this to its Known Exploited Vulnerabilities catalog on 6 May 2025, with a remediation deadline of 27 May 2025 for US federal agencies.
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.
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.
References
- www.facebook.com/security/advisories/cve-2025-27363 · Third Party Advisory
- www.openwall.com/lists/oss-security/2025/03/13/1 · Mailing List
- www.openwall.com/lists/oss-security/2025/03/13/11 · Mailing List
- www.openwall.com/lists/oss-security/2025/03/13/12 · Mailing List
- www.openwall.com/lists/oss-security/2025/03/13/2 · Mailing List
- www.openwall.com/lists/oss-security/2025/03/13/3 · Mailing List
- www.openwall.com/lists/oss-security/2025/03/13/8 · Mailing List
- www.openwall.com/lists/oss-security/2025/03/14/1 · Mailing List
- www.openwall.com/lists/oss-security/2025/03/14/2 · Mailing List
- www.openwall.com/lists/oss-security/2025/03/14/3 · Mailing List
- www.openwall.com/lists/oss-security/2025/03/14/4 · Mailing List
- www.openwall.com/lists/oss-security/2025/05/06/3 · Mailing List
- www.openwall.com/lists/oss-security/2026/04/16/5 · Mailing List
- www.openwall.com/lists/oss-security/2026/04/19/3 · Mailing List
- lists.debian.org/debian-lts-announce/2025/03/msg00030.html · Mailing List
- source.android.com/docs/security/bulletin/2025-05-01 · Third Party Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-27363 · US Government Resource