CVE-2025-47436

EUVD-2025-14947

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 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.

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	9.8 CRITICAL	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Base Score

CVSS 3.x

EPSS Score

Percentile: 24%

Affected Products (NVD)

Vendor	Product	Version
apache	orc	𝑥 < 1.8.9
apache	orc	1.9.0 ≤ 𝑥 < 1.9.6
apache	orc	2.0.0 ≤ 𝑥 < 2.0.5
apache	orc	2.1.0 ≤ 𝑥 < 2.1.2

𝑥

= Vulnerable software versions

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