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I. Basic Information for CVE-2025-11680
Vulnerability Information

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Vulnerability Title
Out-of-bounds Write in libwebsockets PNG parsing
Source: NVD (National Vulnerability Database)
Vulnerability Description
Out-of-bounds Write in unfilter_scanline in warmcat libwebsockets allows, when the LWS_WITH_UPNG flag is enabled during compilation and the HTML display stack is used, to write past a heap allocated buffer possibly causing a crash, when the user visits an attacker controlled website that contains a crafted PNG file with a big width value that causes an integer overflow which value is used for determining the size of a heap allocation.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
跨界内存写
Source: NVD (National Vulnerability Database)
Vulnerability Title
Libwebsockets 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Libwebsockets是lws-team开源的一个规范的 libwebsockets 网络库。 Libwebsockets存在缓冲区错误漏洞,该漏洞源于LWS_WITH_UPNG编译标志启用时,unfilter_scanline函数存在越界写入,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
VendorProductAffected VersionsCPESubscribe
warmcatlibwebsockets 4.0 ~ 4.4.2 -
II. Public POCs for CVE-2025-11680
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III. Intelligence Information for CVE-2025-11680
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IV. Related Vulnerabilities
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