CVE-2025-52434
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 9.0.70-2 |
| sid | Fixed | 9.0.70-2 |
| forky | Fixed | 9.0.70-2 |
| bullseye | Fixed | 9.0.107-0+deb11u1 |
| bookworm | Fixed | 9.0.70-2 |
Red Hat Fixed 2 releases
| Version | Status | Fixed in |
|---|---|---|
| 9 | Fixed | — |
| 8 | Fixed | — |
Rocky Linux Fixed 2 releases
| Version | Status | Fixed in |
|---|---|---|
| 9 | Fixed | — |
| 8 | Fixed | — |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| Maven | org.apache.tomcat:tomcat-util | >=9.0.0.M1,<9.0.107 | 9.0.107 |
| Maven | org.apache.tomcat:tomcat-util | >=8.5.0,<=8.5.100 | |
References
- https://access.redhat.com/errata/RHSA-2025:14181
- https://errata.rockylinux.org/RLSA-2025:14177
- https://nvd.nist.gov/vuln/detail/CVE-2025-52434
- https://github.com/apache/tomcat/commit/8a83c3c42d20762782678932c14005cd3397a018
- https://github.com/apache/tomcat
- https://lists.apache.org/thread/gxgh65004f25y8519coth6w7vchww030
- https://lists.debian.org/debian-lts-announce/2025/07/msg00009.html
- http://www.openwall.com/lists/oss-security/2025/07/10/11
- https://www.suse.com/security/cve/CVE-2025-52434.html
- https://errata.rockylinux.org/RLSA-2025:14181
- https://security-tracker.debian.org/tracker/CVE-2025-52434
- https://access.redhat.com/errata/RHSA-2025:14177
- https://bugzilla.redhat.com/2373015
- https://bugzilla.redhat.com/2373018
- https://bugzilla.redhat.com/2373020
- https://bugzilla.redhat.com/2373309
- https://bugzilla.redhat.com/2379374
- https://bugzilla.redhat.com/2379382
- https://bugzilla.redhat.com/2379386
- https://errata.almalinux.org/8/ALSA-2025-14177.html
- https://errata.almalinux.org/9/ALSA-2025-14181.html
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.