rubygem-concurrent-ruby vulnerabilities (Azure Linux)

2 vulnerabilities.

• rubygem-concurrent-ruby Azure Linux concurrent-ruby: ReadWriteLock allows wrong-thread write release and stray read-release counter corruption CVE-2026-54906 Fix available 2.1 LowJune 19, 2026
• rubygem-concurrent-ruby Azure Linux concurrent-ruby: `ReentrantReadWriteLock` read-count overflow grants a write lock without exclusivity CVE-2026-54905 Fix available 2.0 LowJune 19, 2026