Baitaphish
Security intelligence
SearchLatest briefing
CVE Explorer

CVE-2026-54906

concurrent-ruby is a modern concurrency tools for Ruby. Prior to 1.3.7, Concurrent::ReadWriteLock#release_write_lock does not verify that the calling thread acquired the write lock. Any thread with access to the lock object can release an active write lock held by another thread. A second writer can then enter its critical section while the first writer is still running. Concurrent::ReadWriteLock#release_read_lock also decrements the shared counter even when no read lock is held. Calling it on a
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:f43b9ca5e645d6664625d9cf8550bf7d727e4c7e62cd0571707ac52801965426
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-667","description":"CWE-667: Improper Locking","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:b7c4d6e15fce6de3723fb10480f8a2ebbe6585f5862639c28faf28e72df50e80 · sha256:44b6ec290fff6239… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-414","description":"CWE-414: Missing Lock Check","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:b7c4d6e15fce6de3723fb10480f8a2ebbe6585f5862639c28faf28e72df50e80 · sha256:44b6ec290fff6239… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"concurrent-ruby","vendor":"ruby-concurrency","versions":[{"status":"affected","version":"< 1.3.7"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b7c4d6e15fce6de3723fb10480f8a2ebbe6585f5862639c28faf28e72df50e80 · sha256:44b6ec290fff6239… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackRequirements":"NONE","attackVector":"LOCAL","baseScore":2.1,"baseSeverity":"LOW","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"LOW","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"LOW"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:b7c4d6e15fce6de3723fb10480f8a2ebbe6585f5862639c28faf28e72df50e80 · sha256:44b6ec290fff6239… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

2 source assertions
{"cweId":"CWE-667","description":"CWE-667: Improper Locking","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:b7c4d6e15fce6de3723fb10480f8a2ebbe6585f5862639c28faf28e72df50e80 · sha256:44b6ec290fff6239… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-414","description":"CWE-414: Missing Lock Check","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:b7c4d6e15fce6de3723fb10480f8a2ebbe6585f5862639c28faf28e72df50e80 · sha256:44b6ec290fff6239… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"tags":["exploit"],"url":"https://github.com/ruby-concurrency/concurrent-ruby/security/advisories/GHSA-6wx8-w4f5-wwcr"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b7c4d6e15fce6de3723fb10480f8a2ebbe6585f5862639c28faf28e72df50e80 · sha256:44b6ec290fff6239… · /containers/adp/0/references/0
{"name":"https://github.com/ruby-concurrency/concurrent-ruby/security/advisories/GHSA-6wx8-w4f5-wwcr","tags":["x_refsource_CONFIRM"],"url":"https://github.com/ruby-concurrency/concurrent-ruby/security/advisories/GHSA-6wx8-w4f5-wwcr"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b7c4d6e15fce6de3723fb10480f8a2ebbe6585f5862639c28faf28e72df50e80 · sha256:44b6ec290fff6239… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

← Back to CVE Explorer