CVE-2025-47436

Name: CVE-2025-47436
Creator: NVD / NIST
Published: 2025-05-14T14:15:30.703+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6/10EPSS 0.46%

Last modified Jun 17, 2026

CVE-2025-47436 is a medium-severity vulnerability rated 6/10 on the CVSS scale. 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.. EPSS estimates a 0.46% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

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

CVSS 4.0

6/10

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:N/AU:X/R:X/V:X/RE:M/U:Amber

EPSS Probability

0.46%

36.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-122

Affected Software

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

https://lists.apache.org/thread/kd6tlv8fs5jybmsgxr4vrkdxyc866wrnMailing List, Vendor Advisory
https://orc.apache.org/security/CVE-2025-47436/Third Party Advisory
http://www.openwall.com/lists/oss-security/2025/05/13/4Mailing List, Third Party Advisory

Timeline

Published: May 14, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-47436?

How severe is CVE-2025-47436?

CVE-2025-47436 has a CVSS score of 6/10 (MEDIUM severity). The EPSS model estimates a 0.46% probability of exploitation in the next 30 days.

How do I fix CVE-2025-47436?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-47436?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST