# CVE-2026-80353: tomcat9: Time-of-check time-of-use (TOCTOU) race condition vulnerability in Apache Tomcat when creating unix domain sockets fo...

CVE-2026-80353 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-80353, released October 21, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-80353
- Priority: High
- CVSS: 8.1 (high)
- EPSS: 0.0039
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 20, 2026

## Description

Time-of-check time-of-use (TOCTOU) race condition vulnerability in Apache Tomcat when creating unix domain sockets for the APR/Native connector allows an unauthorised local user to access the unix domain socket. The fix for CVE-2026-65183 only addressed the NIO connector. It did not address the same issue in the APR/Native connector.    This issue affects Apache Tomcat: from 9.0.47 through 9.0.122.    Users are recommended to upgrade to version 9.0.123, which fixes the issue.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | tomcat sles 15.6 | 9.0.123-150200.126.1 | [SUSE-SU-2026:5116-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-5116-1.md) | Nov 7, 2026 |
| Linux | tomcat sles 15.7 | 9.0.123-150200.126.1 | [SUSE-SU-2026:5116-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-5116-1.md) | Nov 7, 2026 |
| Linux | tomcat9 Debian 12.15 (bookworm) | 9.0.70-2 | [DEBIAN-CVE-2026-80353](https://patchblox.com/security/data/fix/linux/debian-cve-2026-80353.md) | Oct 21, 2026 |
| Linux | tomcat9 Debian 13.5 (trixie) | 9.0.70-2 | [DEBIAN-CVE-2026-80353](https://patchblox.com/security/data/fix/linux/debian-cve-2026-80353.md) | Oct 21, 2026 |
| Linux | tomcat9 Debian 14 | 9.0.70-2 | [DEBIAN-CVE-2026-80353](https://patchblox.com/security/data/fix/linux/debian-cve-2026-80353.md) | Oct 21, 2026 |

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Data as of 2026-11-07T18:46:35Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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