// For flags

CVE-2025-47436

Apache ORC: Potential Heap Buffer Overflow during C++ LZO Decompression

Severity Score

6.0
*CVSS v4

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track
*SSVC
Descriptions

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.

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.

*Credits: Jason Villaluna
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Attack Requirements
Present
Privileges Required
High
User Interaction
Active
System
Vulnerable | Subsequent
Confidentiality
Low
Low
Integrity
High
High
Availability
High
High
Attack Vector
Local
Attack Complexity
Low
Attack Requirements
Present
Privileges Required
High
User Interaction
Active
System
Vulnerable | Subsequent
Confidentiality
Low
Low
Integrity
High
High
Availability
High
High
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:Track
Exploitation
None
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2025-05-07 CVE Reserved
  • 2025-05-14 CVE Published
  • 2025-05-14 CVE Updated
  • 2025-07-15 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-122: Heap-based Buffer Overflow
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Apache Software Foundation
Search vendor "Apache Software Foundation"
 Apache ORC
Search vendor "Apache Software Foundation" for product "Apache ORC"
 <= 1.8.8
Search vendor "Apache Software Foundation" for product "Apache ORC" and version " <= 1.8.8"
en
Affected
Apache Software Foundation
Search vendor "Apache Software Foundation"
 Apache ORC
Search vendor "Apache Software Foundation" for product "Apache ORC"
 >= 1.9.0 <= 1.9.5
Search vendor "Apache Software Foundation" for product "Apache ORC" and version " >= 1.9.0 <= 1.9.5"
en
Affected
Apache Software Foundation
Search vendor "Apache Software Foundation"
 Apache ORC
Search vendor "Apache Software Foundation" for product "Apache ORC"
 >= 2.0.0 <= 2.0.4
Search vendor "Apache Software Foundation" for product "Apache ORC" and version " >= 2.0.0 <= 2.0.4"
en
Affected
Apache Software Foundation
Search vendor "Apache Software Foundation"
 Apache ORC
Search vendor "Apache Software Foundation" for product "Apache ORC"
 >= 2.1.0 <= 2.1.1
Search vendor "Apache Software Foundation" for product "Apache ORC" and version " >= 2.1.0 <= 2.1.1"
en
Affected