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Concurrent Ruby: `ReentrantReadWriteLock` read-count overflow grants a write lock without exclusivity
Concurrent Ruby: `ReentrantReadWriteLock` read-count overflow grants a write lock without exclusivity
Affected packages
- concurrent-ruby— before 1.3.7
Exploit signal
- Known exploited (CISA KEV)
- No
- EPSS score
- —
- EPSS percentile
- —
EPSS is the probability a CVE is exploited in the wild; percentile is its rank among all CVEs.
Sources
- https://github.com/ruby-concurrency/concurrent-ruby/security/advisories/GHSA-wv3x-4vxv-whpp
- https://nvd.nist.gov/vuln/detail/CVE-2026-54905
- https://github.com/ruby-concurrency/concurrent-ruby
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/concurrent-ruby/CVE-2026-54905.yml
- https://www.cve.org/CVERecord/SearchResults?query=CVE-2026-54905
Structured record: https://osv.dev/vulnerability/GHSA-wv3x-4vxv-whpp
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