CVE-2025-47436

14.05.2025, 14:15

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 toallocate 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.

Provider	Type	Base Score	Vector
NIST	NIST	UNKNOWN	---
apache	CNA	---	---
CVE	ADP	---	---
CISA-ADP	ADP	---	---

Awaiting analysis

This vulnerability is currently awaiting analysis.

Base Score

CVSS 3.x

EPSS Score

Percentile: 3%

Common Weakness Enumeration

CWE-122 - Heap-based Buffer Overflow
A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

References

https://lists.apache.org/thread/kd6tlv8fs5jybmsgxr4vrkdxyc866wrn

https://orc.apache.org/security/CVE-2025-47436/

http://www.openwall.com/lists/oss-security/2025/05/13/4