CVE-2025-48172
Quick assessment
Affected
CHMLib CHMLib
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
CHMLib是jedwing个人开发者的一个用于处理CHM文件的函数库。 CHMLib 2bef8d0及之前版本存在输入验证错误漏洞，该漏洞源于_chm_decompress_block整数溢出，可能导致堆缓冲区溢出。
Possible ATT&CK Techniques 1 AI
T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2025-48172
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
CHMLib through 2bef8d0, as used in SumatraPDF and other products, has a chm_lib.c _chm_decompress_block integer overflow. There is a resultant heap-based buffer overflow in _chm_fetch_bytes.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
Source: CVE Program / CVE List V5
Vulnerability Title
CHMLib 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
CHMLib是jedwing个人开发者的一个用于处理CHM文件的函数库。 CHMLib 2bef8d0及之前版本存在输入验证错误漏洞，该漏洞源于_chm_decompress_block整数溢出，可能导致堆缓冲区溢出。
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)
Affected Products
II. Public POCs for CVE-2025-48172
| # | POC Description | Source Link | Shenlong Link |
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Patches & Fixes for CVE-2025-48172 (1)
IV. Related Vulnerabilities
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V. Comments for CVE-2025-48172
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