Astra Linux – Vulnerability found in Linux 6.1, Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: SCTP: Added mutual exclusion in procsctpdoudpport. We must serialize calls to sctpudpsockstop and sctpudpsockstart, or risk a crash, as syzbot reported: Oops: General protection fault, likely due to a non-canonical address...

CVE-2026-54905

concurrent-ruby is a modern concurrency tools for Ruby. Prior to 1.3.7, Concurrent::ReentrantReadWriteLock can incorrectly grant a write lock after one thread acquires the read lock 32,768 times. The lock stores a thread's local read and write hold counts in one integer. The low 15 bits are used...

AZL-91290 CVE-2026-54905 affecting package rubygem-concurrent-ruby for versions less than 1.3.7-1

concurrent-ruby is a modern concurrency tools for Ruby. Prior to 1.3.7, Concurrent::ReentrantReadWriteLock can incorrectly grant a write lock after one thread acquires the read lock 32,768 times. The lock stores a thread's local read and write hold counts in one integer. The low 15 bits are used...

CVE-2026-54905

concurrent-ruby is a modern concurrency tools for Ruby. Prior to 1.3.7, Concurrent::ReentrantReadWriteLock can incorrectly grant a write lock after one thread acquires the read lock 32,768 times. The lock stores a thread's local read and write hold counts in one integer. The low 15 bits are used...

CVE-2026-54905 concurrent-ruby: `ReentrantReadWriteLock` read-count overflow grants a write lock without exclusivity

concurrent-ruby is a modern concurrency tools for Ruby. Prior to 1.3.7, Concurrent::ReentrantReadWriteLock can incorrectly grant a write lock after one thread acquires the read lock 32,768 times. The lock stores a thread's local read and write hold counts in one integer. The low 15 bits are used...

CVE-2026-54905

CVE-2026-54905 affects the concurrent-ruby library, specifically Concurrent::ReentrantReadWriteLock. Before version 1.3.7, after a thread acquires the read lock 32,768 times, the local read count overflows into the WRITE_LOCK_HELD bit, causing try_write_lock to treat the thread as if it holds a w...

CVE-2026-54905 concurrent-ruby: `ReentrantReadWriteLock` read-count overflow grants a write lock without exclusivity

concurrent-ruby is a modern concurrency tools for Ruby. Prior to 1.3.7, Concurrent::ReentrantReadWriteLock can incorrectly grant a write lock after one thread acquires the read lock 32,768 times. The lock stores a thread's local read and write hold counts in one integer. The low 15 bits are used...

CVE-2026-54905

concurrent-ruby is a modern concurrency tools for Ruby. Prior to 1.3.7, Concurrent::ReentrantReadWriteLock can incorrectly grant a write lock after one thread acquires the read lock 32,768 times. The lock stores a thread's local read and write hold counts in one integer. The low 15 bits are used...

Concurrent Ruby: `ReentrantReadWriteLock` read-count overflow grants a write lock without exclusivity

Summary Concurrent::ReentrantReadWriteLock can incorrectly grant a write lock after one thread acquires the read lock 32,768 times. The lock stores a thread's local read and write hold counts in one integer. The low 15 bits are used for the read hold count, and bit 15 is used as WRITELOCKHELD...

GHSA-WV3X-4VXV-WHPP Concurrent Ruby: `ReentrantReadWriteLock` read-count overflow grants a write lock without exclusivity

Summary Concurrent::ReentrantReadWriteLock can incorrectly grant a write lock after one thread acquires the read lock 32,768 times. The lock stores a thread's local read and write hold counts in one integer. The low 15 bits are used for the read hold count, and bit 15 is used as WRITELOCKHELD...

PT-2026-51091

Name of the Vulnerable Software and Affected Versions concurrent-ruby versions prior to 1.3.7 Description Concurrent::ReentrantReadWriteLock can incorrectly grant a write lock after a single thread acquires the read lock 32,768 times. The lock manages a thread's local read and write hold counts...

Concurrent Ruby - `ReentrantReadWriteLock` read-count overflow grants a write lock without exclusivity

Summary Concurrent::ReentrantReadWriteLock can incorrectly grant a write lock after one thread acquires the read lock 32,768 times. The lock stores a thread's local read and write hold counts in one integer. The low 15 bits are used for the read hold count, and bit 15 is used as WRITELOCKHELD...

CVE-2026-46106

In the Linux kernel, the following vulnerability has been resolved: eventfs: Hold eventfsmutex and SRCU when remount walks events Commit 340f0c7067a9 "eventfs: Update all the eventfsinodes from the events descriptor" had eventfssetattrs recurse through ei-children on remount. The walk only holds...

Linux kernel 安全漏洞

The Linux kernel is the core of the open-source operating system Linux, developed by the Linux Foundation in the United States. There is a security vulnerability in the Linux kernel, which stems from the lack of mutual exclusion protection for class/subclass/protocol options in USB Gadget FRNDIS...

CVE-2026-43143 mfd: core: Add locking around 'mfd_of_node_list'

In the Linux kernel, the following vulnerability has been resolved: mfd: core: Add locking around 'mfdofnodelist' Manipulating a list in the kernel isn't safe without some sort of mutual exclusion. Add a mutex any time we access / modify 'mfdofnodelist' to prevent possible crashes...

CVE-2026-43143 mfd: core: Add locking around 'mfd_of_node_list'

In the Linux kernel, the following vulnerability has been resolved: mfd: core: Add locking around 'mfdofnodelist' Manipulating a list in the kernel isn't safe without some sort of mutual exclusion. Add a mutex any time we access / modify 'mfdofnodelist' to prevent possible crashes...

CVE-2026-43143

In the Linux kernel, CVE-2026-43143 fixes a concurrency issue in the multi-function device (mfd) core: access/modification of the mfd_of_node_list was not mutex-protected, risking unsafe list manipulation and potential crashes. The fix adds a mutex to guard this list, reducing crash likelihood. P...

CVE-2026-23420

CVE-2026-23420 affects the Linux kernel wlcore Wi‑Fi driver. The issue is a locking-order bug where wl->mutex could be unlocked without being held, as identified by a Clang thread-safety analyzer. This is associated with potential synchronization instability; patches exist in Rootio‑Linux pack...

CVE-2019-16137

An issue was discovered in the spin crate before 0.5.2 for Rust, when RwLock is used. Because memory ordering is mishandled, two writers can acquire the lock at the same time, violating mutual exclusion...

SUSE CVE-2025-68756

In the Linux kernel, the following vulnerability has been resolved: block: Use RCU in blkmqunquiescetagset instead of set-taglistlock blkmqadd,delqueuetagset functions add and remove queues from tagset, the functions make sure that tagset and queues are marked as shared when two or more queues ar...