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 rebalance_children function. When an internal btree node with a single entry is shared, the system incorrectly tracks the usage of child nodes. This can lead to 'device mapper: space map common: unable to decrement block' errors, potentially causing a denial of service or data integrity issues.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.