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...

PT-2025-26018 · Linux +2 · Linux Kernel +2

Name of the Vulnerable Software and Affected Versions: Linux kernel versions prior to 5.19.0-rc6 Description: A use-after-free issue has been identified in the Linux kernel, specifically in the dm sm register threshold callback function. This issue can be triggered when a metadata commit fails,...