What is CVE-2026-54905?

CVE-2026-54905 is a security advisory published by Microsoft Security Response Center (MSRC) with Low severity. concurrent-ruby: `ReentrantReadWriteLock` read-count overflow grants a write lock without exclusivity

Which CVE IDs does CVE-2026-54905 cover?

CVE-2026-54905 covers the following CVE IDs: CVE-2026-54905. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-54905?

CVE-2026-54905 has a CVSS v3 base score of 5.5, published by Microsoft Security Response Center (MSRC).

CVE-2026-54905LowCVSS 5.5

concurrent-ruby: `ReentrantReadWriteLock` read-count overflow grants a write lock without exclusivity

Vendor

Microsoft Security Response Center (MSRC)

Published

June 30, 2026

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2026-54905 →