CWE-414 vulnerabilities

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.

CVE-2025-54510 is a vulnerability in AMD EPYC 9004 Series Processors involving a missing lock verification in the AMD Secure Processor firmware. This flaw allows a locally authenticated attacker with administrative privileges to alter MMIO routing on some Zen 5-based products, which could compromise the integrity of guest systems. The vulnerability has a medium severity rating with a CVSS 4.0 score of 5.9. No patch or remediation information is currently available.

Race condition vulnerability in the kernel file system module. Impact: Successful exploitation of this vulnerability may affect availability.