CVE-2025-27363
Quick assessment
Affected
FreeType FreeType
Exploitation
Confirmed exploitation in the wild; remediate immediately
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
FreeType是FreeType开源的一款开源字体渲染库。 FreeType 2.13.0版本及之前版本存在缓冲区错误漏洞，该漏洞源于解析TrueType GX和可变字体文件时存在越界写入，可能导致执行任意代码。
In-the-Wild Activity Observed
cisa_kev · confirmed
Possible ATT&CK Techniques 2 AI
T1059 · Command and Scripting Interpreter T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2025-27363
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
FreeType 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FreeType是FreeType开源的一款开源字体渲染库。 FreeType 2.13.0版本及之前版本存在缓冲区错误漏洞，该漏洞源于解析TrueType GX和可变字体文件时存在越界写入，可能导致执行任意代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Shenlong Deep Dive — AI Deep Analysis
10-question deep dive: root cause, exploitation, mitigation, urgency. Read summary free, full version requires login.
Affected Products
II. Public POCs for CVE-2025-27363
| # | POC Description | Source Link | Shenlong Link |
|---|---|---|---|
| 1 | None | https://github.com/zhuowei/CVE-2025-27363-proof-of-concept | POC Details |
| 2 | None | https://github.com/ov3rf1ow/CVE-2025-27363 | POC Details |
| 3 | Integer overflow in FreeType software, which also affects Chrome | https://github.com/tin-z/CVE-2025-27363 | POC Details |
AI-Generated POC
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No public POC found.
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Other References for CVE-2025-27363 (1)
-
https://www.facebook.com/security/advisories/cve-2025-27363 x_refsource_CONFIRM
IV. Related Vulnerabilities
Same product: FreeType
V. Comments for CVE-2025-27363
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