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...

Astra Linux – Vulnerability found in Linux 6.1, Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: ksmbd: Fixed a reference count leak when an invalid session is found during session lookup. When a session is found, but its state is not SMB2SESSIONVALID, it indicates that no valid session was found. However, the reference coun...

Astra Linux – Vulnerability in Linux 6.12

In the Linux kernel, the following vulnerabilities have been resolved: i40e: Fixed a preempt count leak in the napi poll tracepoint. Using getcpu in the tracepoint assignment causes an obvious preempt count leak, because nothing invokes putcpu to undo it. softirq: Huh, entered softirq 3 for NETRX...

Astra Linux – Vulnerability in Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: Tracing: The WARNON message in tracingbuffersmmapclose has been fixed. When a process forks, the child process copies the parent’s virtual memory addresses, but the usermapped reference count is not incremented. As a result, when...

Astra Linux – Vulnerability in Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: md/raid5: Fixed possible null-pointer dereferences in raid5storegroupthreadcnt. The variable mddev-private is first assigned to conf, and then checked: c conf = mddev-private; if !conf… If conf is NULL, then mddev-private is also...

Astra Linux – Vulnerability in Linux 6.12

In the Linux kernel, the following vulnerabilities have been resolved: RDMA/rxe: Fixed a race condition in QP timer handlers I encountered the following warning: WARNING: drivers/infiniband/sw/rxe/rxetask.c:249 at rxeschedtask+0x1c8/0x238 rdmarxe, CPU0: swapper/0/0 … libsha1 last unloaded:...

Astra Linux – Vulnerability found in Linux 6.1, Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: tpm: st33zp24: Fixed an issue where missing cleanup was performed after a getburstcount call failed. getburstcount may return -EBUSY when it times out. In such cases, st33zp24send returns directly without releasing the locality...

Astra Linux – Vulnerability found in Linux 6.12, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: Remove the improper idxdfree The call to idxdfree introduces a duplicate putdevice call, resulting in a reference count underflow: refcountt: underflow; use-after-free. WARNING: CPU: 15, PID: 4428, at...

UBUNTU-CVE-2026-52915

In the Linux kernel, the following vulnerability has been resolved: netfilter: ip6thbh: reject oversized option lists struct ip6topts stores at most IP6TOPTSOPTSNR option descriptors, but hbhmt6check does not reject larger optsnr values supplied from userspace. Validate optsnr in the rule setup...

CVE-2026-52930

In the Linux kernel, the following vulnerability has been resolved: ipc/shm: serialize orphan cleanup with shmnattch updates shmdestroyorphaned walks the shm idr under shmidsns.rwsem, but that does not serialize all fields tested by shmmaydestroy. In particular, shmnattch is updated while holding...

EUVD-2026-38700

In the Linux kernel, the following vulnerability has been resolved: ipc/shm: serialize orphan cleanup with shmnattch updates shmdestroyorphaned walks the shm idr under shmidsns.rwsem, but that does not serialize all fields tested by shmmaydestroy. In particular, shmnattch is updated while holding...

CVE-2026-52915 netfilter: ip6t_hbh: reject oversized option lists

In the Linux kernel, the following vulnerability has been resolved: netfilter: ip6thbh: reject oversized option lists struct ip6topts stores at most IP6TOPTSOPTSNR option descriptors, but hbhmt6check does not reject larger optsnr values supplied from userspace. Validate optsnr in the rule setup...

PT-2026-51953

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An integer overflow exists in the device-mapper log dm log component. The region count local variable in the create log context function is declared as a 32-bit unsigned integer, while t...

PT-2026-51920

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the nfsd4 add rdaccess to wrdeleg function where the nfs4 file get access function may be incorrectly called to increment the nfs4 file access count if fp-fi fdsO RDON...

PT-2026-58091

Name of the Vulnerable Software and Affected Versions Pillow versions 12.0.0 through 12.2.0 Description The EPS parser in PIL/EpsImagePlugin.py accepts a negative byte count within the %%BeginBinary directive. A specially crafted EPS file can trigger the Image.open function to seek backwards to t...

Linux Distros Unpatched Vulnerability : CVE-2026-55199

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - libssh2 through 1.11.1, fixed in commit 1762685, contains a pre-authentication denial of service vulnerability in the SSHMSGEXTINFO handler in src/packet.c that...

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...

undici WebSocket client vulnerable to denial of service via fragment count bypass

Impact The undici WebSocket client enforces maxPayloadSize on the cumulative byte count of fragments in a message but does not enforce a limit on the number of fragments. A malicious WebSocket server can stream many small or empty continuation frames that each pass per-frame and cumulative-size...

NPM: undici WebSocket client vulnerable to denial of service via fragment count bypass

NPM: undici WebSocket client vulnerable to denial of service via fragment count bypass vulnerability discovered by ? in WordPress Npm undici versions 6.27.0...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: media: i2c: ov5647 – A leak in the runtime PM reference count was fixed in sctrl. Three control cases AUTOGAIN, EXPOSUREAUTO, ANALOGUEGAIN directly return without calling pmruntimeput, causing a leak in the runtime PM reference...