CVE-2026-33524— Zserio: Integer Overflow in BitStreamReader and Unbounded Memory Allocation in Deserialization
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I. Basic Information for CVE-2026-33524
Vulnerability Information
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Vulnerability Title
Zserio: Integer Overflow in BitStreamReader and Unbounded Memory Allocation in Deserialization
Source: NVD (National Vulnerability Database)
Vulnerability Description
Zserio is a framework for serializing structured data with a compact and efficient way with low overhead. Prior to 2.18.1, a crafted payload as small as 4-5 bytes can force memory allocations of up to 16 GB, crashing any process with an OOM error (Denial of Service). This vulnerability is fixed in 2.18.1.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
未经控制的内存分配
Source: NVD (National Vulnerability Database)
Vulnerability Title
zserio 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
zserio是Navigation Data Standard e.V.开源的一个高效序列化结构化数据的框架。 Zserio 2.18.1之前版本存在安全漏洞，该漏洞源于特制有效载荷可强制分配高达16 GB的内存，导致进程因OOM错误崩溃。
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-2026-33524
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IV. Related Vulnerabilities
Same weakness: CWE-789
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