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Linux Kernel: DAMON sysfs Directory Cleanup Failure
CVE-2026-23142
Summary
A bug in the Linux kernel's DAMON sysfs interface can cause it to malfunction until the system is restarted. This can lead to memory leaks. To fix this issue, the kernel has been updated to properly clean up directories in case of setup failures.
Original title
In the Linux kernel, the following vulnerability has been resolved:
mm/damon/sysfs-scheme: cleanup access_pattern subdirs on scheme dir setup failure
When a DAMOS-scheme DAMON sysfs directory set...
Original description
In the Linux kernel, the following vulnerability has been resolved:
mm/damon/sysfs-scheme: cleanup access_pattern subdirs on scheme dir setup failure
When a DAMOS-scheme DAMON sysfs directory setup fails after setup of
access_pattern/ directory, subdirectories of access_pattern/ 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.
mm/damon/sysfs-scheme: cleanup access_pattern subdirs on scheme dir setup failure
When a DAMOS-scheme DAMON sysfs directory setup fails after setup of
access_pattern/ directory, subdirectories of access_pattern/ 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.
- https://git.kernel.org/stable/c/16236b0b4a08fa3e326cf1373ef789dabdc2e30d
- https://git.kernel.org/stable/c/392b3d9d595f34877dd745b470c711e8ebcd225c
- https://git.kernel.org/stable/c/725d4fdaa01bd1161782081f419e1568cc7432e0
- https://git.kernel.org/stable/c/ae8ac0066b48ed957bdcab58f0d3543549c57a29
- https://git.kernel.org/stable/c/e9711bd0e64812c694a228cf58c9e6032decee54
Published: 14 Feb 2026 · Updated: 10 Mar 2026 · First seen: 6 Mar 2026