Apache Tomcat is vulnerable to resource exhaustion when using the APR/Native connector
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.
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2025-52434US | — | — | ||
Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') vulnerability in Apache Tomcat when using the APR/Native connector. This was particularl… | ||||
references
External citations — patches, advisories, analysis.
- http://www.openwall.com/lists/oss-security/2025/07/10/11WEB
- https://github.com/apache/tomcatPACKAGE
- https://github.com/apache/tomcat/commit/8a83c3c42d20762782678932c14005cd3397a018WEB
- https://lists.apache.org/thread/gxgh65004f25y8519coth6w7vchww030WEB
- https://lists.debian.org/debian-lts-announce/2025/07/msg00009.htmlWEB
- https://nvd.nist.gov/vuln/detail/CVE-2025-52434ADVISORY
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