CVE-2025-52434
HIGH7.5EPSS 1.2%Apache Tomcat: APR/Native Connector crash leading to DoS
Published: 7/10/2025Modified: 5/18/2026
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 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.
Affected packages (3)
- Bitnami/tomcat>= 9.0.0, < 9.0.107
- Debian/tomcat9from 0, < 9.0.107-0+deb11u1
- Maven/org.apache.tomcat:tomcat-util>= 9.0.0.M1, < 9.0.107
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:U |
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
References (7)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2025-52434
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2025-52434
- PATCHhttps://github.com/apache/tomcat
- WEBhttps://github.com/apache/tomcat/commit/8a83c3c42d20762782678932c14005cd3397a018
- WEBhttps://lists.apache.org/thread/gxgh65004f25y8519coth6w7vchww030
- WEBhttps://lists.debian.org/debian-lts-announce/2025/07/msg00009.html
- WEBhttp://www.openwall.com/lists/oss-security/2025/07/10/11