CVE-2026-23142: mm/damon/sysfs-scheme: cleanup access_pattern subdirs on scheme dir setup failure
In the Linux kernel, the following vulnerability has been resolved:
mm/damon/sysfs-scheme: cleanup accesspattern subdirs on scheme dir setup failure
When a DAMOS-scheme DAMON sysfs directory setup fails after setup of accesspattern/ directory, subdirectories of accesspattern/ directory are not cleaned up. As a result, DAMON sysfs interface is nearly broken until the system reboots, and the memory for the unremoved directory is leaked.
Cleanup the directories under such failures.
Affected Software
Remediation
Event History
Frequently Asked Questions
What access is required to exploit this issue?
The CVSS vector indicates local access with low privileges is required. No user interaction is required.
What is the practical impact if the failure path is triggered?
The DAMON sysfs interface can become nearly unusable until the system is rebooted. Unremoved directory memory is also leaked, producing a high availability impact.
What can be done if the patch cannot be applied immediately?
A reboot restores the DAMON sysfs interface after the affected failure condition. A patch is available for the permanent fix.