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CVE-2025-47436— Apache ORC: Potential Heap Buffer Overflow during C++ LZO Decompression

Quick assessment

Affected
Apache Software Foundation Apache ORC
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.

Apache ORC是美国阿帕奇（Apache）基金会的一个高性能列式存储格式，专为Hadoop生态系统设计，优化大数据查询与分析性能。 Apache ORC 2.1.1及之前版本存在安全漏洞，该漏洞源于LZO解压缩逻辑存在堆缓冲区溢出，可能导致内存损坏。

AI Predicted 8.8 Difficulty: Easy EPSS 0.53% · P43

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2025-47436

Vulnerability Information
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Vulnerability Title
Apache ORC: Potential Heap Buffer Overflow during C++ LZO Decompression
Source: CVE Program / CVE List V5
Vulnerability Description
Heap-based Buffer Overflow vulnerability in Apache ORC. A vulnerability has been identified in the ORC C++ LZO decompression logic, where specially crafted malformed ORC files can cause the decompressor to allocate a 250-byte buffer but then attempts to copy 295 bytes into it. It causes memory corruption. This issue affects Apache ORC C++ library: through 1.8.8, from 1.9.0 through 1.9.5, from 2.0.0 through 2.0.4, from 2.1.0 through 2.1.1. Users are recommended to upgrade to version 1.8.9, 1.9.6, 2.0.5, and 2.1.2, which fix the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:A/VC:L/VI:H/VA:H/SC:L/SI:H/SA:H/S:N/RE:M/U:Amber
Source: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
Apache ORC 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache ORC是美国阿帕奇（Apache）基金会的一个高性能列式存储格式，专为Hadoop生态系统设计，优化大数据查询与分析性能。 Apache ORC 2.1.1及之前版本存在安全漏洞，该漏洞源于LZO解压缩逻辑存在堆缓冲区溢出，可能导致内存损坏。
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
Apache Software Foundation Apache ORC 0 ~ 1.8.8 -

II. Public POCs for CVE-2025-47436

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III. Intelligence Information for CVE-2025-47436

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Vendor Advisories for CVE-2025-47436 (1)

Same Patch Batch · Apache Software Foundation · 2025-05-14 · 4 CVEs total

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CVE-2025-26864 Apache IoTDB: Exposure of Sensitive Information in IoTDB OpenID Authentication

IV. Related Vulnerabilities

Same product: Apache ORC
Same vendor: Apache Software Foundation
Same weakness: CWE-122

V. Comments for CVE-2025-47436

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