CVE-2025-52434 - CVE House
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Status published Unknown CVE-2025-52434

Apache Tomcat: APR/Native Connector crash leading to DoS

Vulnerability Description

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') vulnerability in Apache Tomcat when using the APR/Native connector. This was particularly noticeable with client initiated closes of HTTP/2 connections. This issue affects Apache Tomcat: from 9.0.0.M1 through 9.0.106. The following versions were EOL at the time the CVE was created but are known to be affected: 8.5.0 through 8.5.100. Other, older, EOL versions may also be affected. Users are recommended to upgrade to version 9.0.107, which fixes the issue.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Nacl
  • 12SqweR
  • WHOAMI
  • yyzmoon

References

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Affected Vendor

Apache Software Foundation

View all reports →

Affected Software

Apache Tomcat
Vulnerable Versions:
9.0.0.M1, 8.5.0, 5, 10.0.0-M1

Timeline

Official Publish: July 10th, 2025
Last Modified: November 4th, 2025
Added to House: July 22nd, 2026

CVSS Vectors

No vector data available

Weaknesses (CWE)

CWE-362

MITRE ATT&CK TTPs

T1068 Exploitation for Privilege Escalation
Privilege Escalation
T1574 Hijack Execution Flow
Persistence
T1565 Data Manipulation
Impact
T1499 Endpoint Denial of Service
Impact
T1190 Exploit Public-Facing Application
Initial Access