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CVE-2026-54906

CRITICAL · CVSS 9.8 EPSS %0.16 Public Exploit

Kaynak: NVD + CISA KEV + EPSS · Yayınlanma: 2026-06-24T17:17:29.550 · Çekilme zamanı: 2026-06-30T18:32:28.864382+00:00

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Detaylı analiz gerekiyor.

Public Exploit Sinyali

Bu CVE için açıklama veya referanslarda public exploit / PoC / GitHub / Metasploit sinyali tespit edildi.

GitHub PoC Linkleri

Not: Bu bağlantılar yalnızca güvenlik araştırması ve doğrulama amacıyla listelenmiştir.

CVE
CVE-2026-54906
Severity
CRITICAL
CVSS
9.8
EPSS
%0.16

Orijinal NVD Açıklaması

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 fresh lock changes the counter from 0 to -1, after which normal read acquisition raises Concurrent::ResourceLimitError. This is a synchronization correctness issue in the public Concurrent::ReadWriteLock API. This vulnerability is fixed in 1.3.7.