CVE-2025-47436

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.

CVSS v3.1 Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-122 CWE-122

Affected Products

Vendor	Product	Versions
apache	orc	< 1.8.9
apache	orc	1.9.0 — 1.9.6
apache	orc	2.0.0 — 2.0.5
apache	orc	2.1.0 — 2.1.2

References

Advisories & Patches

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

Other References

https://orc.apache.org/security/CVE-2025-47436/ http://www.openwall.com/lists/oss-security/2025/05/13/4

Frequently Asked Questions

What is CVE-2025-47436? +

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. It has a CVSS v3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2025-47436? +

CVE-2025-47436 has a CVSS v3.1 score of 9.8 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately.

What products are affected by CVE-2025-47436? +

CVE-2025-47436 affects products from apache, specifically: orc. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-47436? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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