SUSE CVE-2026-46107

In the Linux kernel, the following vulnerability has been resolved: dm-thin: fix metadata refcount underflow There's a bug in dm-thin in the function rebalancechildren. If the internal btree node has one entry, the code tries to copy all btree entries from the node's child to the node itself and...

CVE-2026-46107

A flaw was found in the Linux kernel's Device Mapper dm-thin component. This vulnerability, a metadata reference count underflow, occurs in the rebalancechildren function. When an internal btree node with a single entry is shared, the system incorrectly tracks the usage of child nodes. This can...

Astra Linux - уязвимость в linux, linux-5.10, linux-5.15, linux-6.1

In the Linux kernel, the following vulnerability has been resolved: dm thin: Make getfirstthin use listfirstornullrcu, which performs a single READONCE and returns NULL if the list is already empty. The documentation in rculist.h explains the absence of listemptyrcu and warns programmers against...

CVE-2022-50549 dm thin: Fix ABBA deadlock between shrink_slab and dm_pool_abort_metadata

In the Linux kernel, the following vulnerability has been resolved: dm thin: Fix ABBA deadlock between shrinkslab and dmpoolabortmetadata Following concurrent processes: P1drop cache P2kworker dropcachessysctlhandler dropslab shrinkslab downread&shrinkerrwsem - LOCK A doshrinkslab supercachescan...

SUSE CVE-2025-21664

In the Linux kernel, the following vulnerability has been resolved: dm thin: make getfirstthin use rcu-safe list first function The documentation in rculist.h explains the absence of listemptyrcu and cautions programmers against relying on a listempty - listfirst sequence in RCU safe code. This i...

DEBIAN-CVE-2025-21664

In the Linux kernel, the following vulnerability has been resolved: dm thin: make getfirstthin use rcu-safe list first function The documentation in rculist.h explains the absence of listemptyrcu and cautions programmers against relying on a listempty - listfirst sequence in RCU safe code. This i...

UBUNTU-CVE-2025-21664

In the Linux kernel, the following vulnerability has been resolved: dm thin: make getfirstthin use rcu-safe list first function The documentation in rculist.h explains the absence of listemptyrcu and cautions programmers against relying on a listempty - listfirst sequence in RCU safe code. This i...

kernel: dm thin: Fix ABBA deadlock between shrink_slab and dm_pool_abort_metadata

An ABBA deadlock flaw was found in the Linux kernel's device-mapper thin provisioning subsystem between the memory reclaim path and metadata abort handling. A local user can trigger this issue by initiating cache drop operations while dm-thin operations are active, causing process P1 to hold...

kernel: dm thin: Use last transaction's pmd->root when commit failed

A metadata handling flaw was found in the Linux kernel device-mapper thin provisioning driver. After a failed metadata commit, the in-memory root pointer could reference a mixed set of fresh and stale tree nodes. Subsequent lookups may loop or stall. A local user could use this flaw to cause the...

kernel: dm thin: Use last transaction's pmd->root when commit failed

A metadata handling flaw was found in the Linux kernel device-mapper thin provisioning driver. After a failed metadata commit, the in-memory root pointer could reference a mixed set of fresh and stale tree nodes. Subsequent lookups may loop or stall. A local user could use this flaw to cause the...

Troubleshooting common issues with XenServer clustered pools and GFS2 SRs

XenServer uses GFS2 to make thin provisioning available by using block-based storage devices that are accessed through iSCSI software initiator or Hardware HBA. This article provides a guide for troubleshooting common issues when GFS2 SRThin Provisioning is being used in XenServer or Citrix...

Troubleshooting thin provisioning for shared block storage on XenServer

XenServer and Citrix Hypervisor use GFS2 to provide the ability to set up thin provisioning with a shared block storage device. Pools that use GFS2 to thin provision their shared block storage are clustered and behave differently to pools that use shared file-based storage or LVM with shared bloc...

How To Enable Thin Provisioning On XenServer

This article explains how to enable Thin Provisioning on XenServer...