Astra Linux – vulnerability in linux-6.1, linux-6.12, linux-6.18

In the Linux kernel, the following vulnerability has been resolved: dm array: reject an array block whose value size is not the caller’s arrayblockcheck can only compare the header against itself; thus, a block with valuesize 4 and maxentries 1018 is internally consistent and passes validation...

Important: Red Hat Security Advisory: kernel-rt security update

An update for kernel-rt is now available for Red Hat Enterprise Linux 7 Extended Lifecycle Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available...

CVE-2026-99256

A flaw was found in the Linux kernel's Device Mapper cache dm-cache subsystem. Improper lock ownership handling in the background work locking mechanism allows a lock to be released by a different process than the one that acquired it when suspending and resuming a cache device. A local user with...

CVE-2026-99256

In the Linux kernel, the following vulnerability has been resolved: dm cache: fix issue with background work locking dm cache used a rwsemaphore for backgroundworklock. Write locks on rwsemaphores have strict owner semantics, but there was no guarantee that the process that locked...

SUSE CVE-2026-99256

In the Linux kernel, the following vulnerability has been resolved: dm cache: fix issue with background work locking dm cache used a rwsemaphore for backgroundworklock. Write locks on rwsemaphores have strict owner semantics, but there was no guarantee that the process that locked...

kernel: dm cache policy smq: fix missing locks in invalidating cache blocks

A flaw was found in the Linux kernel's device-mapper dm cache policy, specifically within the smq module. In passthrough mode, the invalidatemapping operation lacks proper locking, allowing for concurrent access. This can lead to data races, resulting in data corruption or use-after-free issues,...

DEBIAN-CVE-2026-99256

In the Linux kernel, the following vulnerability has been resolved: dm cache: fix issue with background work locking dm cache used a rwsemaphore for backgroundworklock. Write locks on rwsemaphores have strict owner semantics, but there was no guarantee that the process that locked...

AZL-112616 CVE-2026-99256 affecting package kernel for versions less than 6.6.161.1-1

In the Linux kernel, the following vulnerability has been resolved: dm cache: fix issue with background work locking dm cache used a rwsemaphore for backgroundworklock. Write locks on rwsemaphores have strict owner semantics, but there was no guarantee that the process that locked...

CVE-2026-99256

In the Linux kernel, the following vulnerability has been resolved: dm cache: fix issue with background work locking dm cache used a rwsemaphore for backgroundworklock. Write locks on rwsemaphores have strict owner semantics, but there was no guarantee that the process that locked...

UBUNTU-CVE-2026-99256

In the Linux kernel, the following vulnerability has been resolved: dm cache: fix issue with background work locking dm cache used a rwsemaphore for backgroundworklock. Write locks on rwsemaphores have strict owner semantics, but there was no guarantee that the process that locked...

CVE-2026-99256

The Linux kernel contains a locking issue within the dm cache component involving the background_work_lock. The system incorrectly used an rw_semaphore, which enforces strict owner semantics; however, there was no guarantee that the process unlocking the semaphore was the same as the one that loc...

EUVD-2026-115767

In the Linux kernel, the following vulnerability has been resolved: dm cache: fix issue with background work locking dm cache used a rwsemaphore for backgroundworklock. Write locks on rwsemaphores have strict owner semantics, but there was no guarantee that the process that locked...

CVE-2026-99256 dm cache: fix issue with background work locking

In the Linux kernel, the following vulnerability has been resolved: dm cache: fix issue with background work locking dm cache used a rwsemaphore for backgroundworklock. Write locks on rwsemaphores have strict owner semantics, but there was no guarantee that the process that locked...

CVE-2026-99256 dm cache: fix issue with background work locking

In the Linux kernel, the following vulnerability has been resolved: dm cache: fix issue with background work locking dm cache used a rwsemaphore for backgroundworklock. Write locks on rwsemaphores have strict owner semantics, but there was no guarantee that the process that locked...

CVE-2026-99256

In the Linux kernel, the following vulnerability has been resolved: dm cache: fix issue with background work locking dm cache used a rwsemaphore for backgroundworklock. Write locks on rwsemaphores have strict owner semantics, but there was no guarantee that the process that locked...

CVE-2026-99256: Linux: In the Linux kernel, the following vulnerability has been resolved: dm cache: fix issue with background work locking dm…

In the Linux kernel, the following vulnerability has been resolved: dm cache: fix issue with background work locking dm cache used a rwsemaphore for backgroundworklock. Write locks on rwsemaphores have strict owner semantics, but there was no guarantee that the process that locked...

PT-2026-136092

In the Linux kernel, the following vulnerability has been resolved: dm cache: fix issue with background work locking dm cache used a rw semaphore for background work lock. Write locks on rw semaphores have strict owner semantics, but there was no guarantee that the process that locked background...

Linux Distros Unpatched Vulnerability : CVE-2026-99256

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - dm cache: fix issue with background work locking dm cache used a rwsemaphore for backgroundworklock. Write locks on rwsemaphores have strict owner semantics, bu...

Siemens SIMATIC S7-1500 TM MFP Improper Input Validation (CVE-2026-53265)

In the Linux kernel, the following vulnerability has been resolved: dm cache policy smq: check allocation under invalidate lock commit 2d1f7b65f5de 'dm cache policy smq: fix missing locks in invalidating cache blocks' added mq-lock around the destructive part of smqinvalidatemapping, but left the...

Astra Linux – vulnerability in linux-6.1, linux-6.12

In the Linux kernel, the following vulnerability has been resolved: dm cache policy smq: fix missing locks in invalidating cache blocks In passthrough mode, the policy invalidatemapping operation is called simultaneously from multiple workers; therefore, it should be protected by a lock. Otherwis...