Vulnerability Details : 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.
Published 2025-03-11 13:28:32
Updated 2025-05-07 16:00:56
Source Facebook, Inc.
View at NVD,   CVE.org

Products affected by CVE-2025-27363

CVE-2025-27363 is in the CISA Known Exploited Vulnerabilities Catalog

CISA vulnerability name:
FreeType Out-of-Bounds Write Vulnerability
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.
CISA description:
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.
Notes:
This vulnerability affects a common open-source component, third-party library, or a protocol used by different products. Please check with specific vendors for information on patching status. For more information, please see: https://source.android.com/docs/security/bulletin/2025-05-01 ; https://nv
Added on 2025-05-06 Action due date 2025-05-27

Exploit prediction scoring system (EPSS) score for CVE-2025-27363

EPSS FAQ
68.42%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 98 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2025-27363

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
8.1
 HIGH CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/...
N/A
N/A
 Facebook, Inc. 2025-03-11
8.1
 HIGH CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
2.2
5.9
 Facebook, Inc. 2025-03-11
8.1
 HIGH CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
2.2
5.9
 NIST 2025-05-07

CWE ids for CVE-2025-27363

  • The product writes data past the end, or before the beginning, of the intended buffer.
    Assigned by: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

References for CVE-2025-27363

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