CVE-2025-54939
Quick assessment
Affected
litespeedtech LSQUIC
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Litespeed Technologie LiteSpeed QUIC（LSQUIC）是美国Litespeed Technologie公司的一种用于服务器和客户端的 QUIC 和 HTTP/3 功能的开源实现。 Litespeed Technologie LiteSpeed QUIC 4.3.1之前版本存在安全漏洞，该漏洞源于lsquic_engine_packet_in存在内存泄漏。
Possible ATT&CK Techniques 1 AI
T1496 · Resource Hijacking
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I. Basic Information for CVE-2025-54939
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
LiteSpeed QUIC (LSQUIC) Library before 4.3.1 has an lsquic_engine_packet_in memory leak.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Vulnerability Title
Litespeed Technologie LiteSpeed QUIC 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Litespeed Technologie LiteSpeed QUIC（LSQUIC）是美国Litespeed Technologie公司的一种用于服务器和客户端的 QUIC 和 HTTP/3 功能的开源实现。 Litespeed Technologie LiteSpeed QUIC 4.3.1之前版本存在安全漏洞，该漏洞源于lsquic_engine_packet_in存在内存泄漏。
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
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| litespeedtech | LSQUIC | 0 ~ 4.3.1 | - |
|
II. Public POCs for CVE-2025-54939
| # | POC Description | Source Link | Shenlong Link |
|---|---|---|---|
| 1 | POC for CVE-2025-54939. ~ forcibly loads 200MiB/s in server's memory | https://github.com/yohannslm/CVE-2025-54939 | POC Details |
AI-Generated POC
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Security Blog Posts for CVE-2025-54939 (1)
IV. Related Vulnerabilities
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V. Comments for CVE-2025-54939
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