// For flags

CVE-2025-52434

Apache Tomcat: APR/Native Connector crash leading to DoS

Severity Score

7.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Attend
*SSVC
Descriptions

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. Users are recommended to upgrade to version 9.0.107, which fixes the issue.

*Credits: Nacl, 12SqweR, WHOAMI, yyzmoon
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:Attend
Exploitation
None
Automatable
Yes
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2025-06-16 CVE Reserved
  • 2025-07-10 CVE Published
  • 2025-07-11 CVE Updated
  • 2025-07-12 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CAPEC
References (1)
URL Tag Source
URL Date SRC
URL Date SRC
URL Date SRC
https://lists.apache.org/thread/gxgh65004f25y8519coth6w7vchww030 2025-07-10
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 Tomcat
Search vendor "Apache Software Foundation" for product "Apache Tomcat"
 >= 9.0.0.M1 <= 9.0.106
Search vendor "Apache Software Foundation" for product "Apache Tomcat" and version " >= 9.0.0.M1 <= 9.0.106"
en
Affected