CVE-2026-54906: concurrent-ruby: ReadWriteLock allows wrong-thread write release and stray read-release counter corruption
Overview
- Severity
- Critical (CVSS 9.8)
- CVSS Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Exploit Status
- Not Exploited
- Patch Tuesday
- 2026-Jun
- Released
- 2026-06-27
- Last Updated
- 2026-06-30
- EPSS Score
- 0.16% (percentile: 5.7%)
Affected Products (1)
Open Source Software
- azl3 rubygem-concurrent-ruby 1.2.2-1 on Azure Linux 3.0
Revision History
- 2026-06-27: Information published.
- 2026-06-29: Information published.
- 2026-06-30: Information published.