CVE-2026-64185

Summary

In the Linux kernel, the following vulnerability has been resolved:

sysfs: don't remove existing directory on update failure

When sysfs_update_group() is called for a named group and create_files() fails (e.g. -ENOMEM), internal_create_group() calls kernfs_remove(kn) on the group directory. In the update path, kn was obtained via kernfs_find_and_get() and refers to a directory that already existed before this call. Removing it silently destroys a sysfs group that the caller did not create.

Only remove the directory if we created it ourselves. On update failure the directory remains as it is left empty by remove_files() inside create_files(), but can be repopulated by a retry.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxc855cf2759d27142f771173d9fd8e7fdf9cf5138 < c5e125c828b701afaf7493b42a14aa89362ff36daffected
LinuxLinuxc855cf2759d27142f771173d9fd8e7fdf9cf5138 < ccadd32cc1263802a5969c9efe0e96225450428caffected
LinuxLinuxc855cf2759d27142f771173d9fd8e7fdf9cf5138 < 14f2c14ae86c4af17a0a9f8ab46dacf2d5fd1d8aaffected
LinuxLinuxc855cf2759d27142f771173d9fd8e7fdf9cf5138 < 31527d80234caf83dc96ad478645e57df9de4472affected
LinuxLinuxc855cf2759d27142f771173d9fd8e7fdf9cf5138 < 57b285e0368290aa55f79ba11419b96d0ebdb418affected
LinuxLinuxc855cf2759d27142f771173d9fd8e7fdf9cf5138 < 48fa96538bd2868034d33429e4565fda384d0736affected
LinuxLinuxc855cf2759d27142f771173d9fd8e7fdf9cf5138 < 708f6926f61f71e09b5e9fd668b9882ccd46e69faffected
LinuxLinuxc855cf2759d27142f771173d9fd8e7fdf9cf5138 < 237557b8a81ab948e8332f7c0058e758f081c0a3affected
LinuxLinux4.19affected
LinuxLinux0 < 4.19unaffected
LinuxLinux5.10.258 <= 5.10.*unaffected
LinuxLinux5.15.209 <= 5.15.*unaffected
LinuxLinux6.1.175 <= 6.1.*unaffected
LinuxLinux6.6.142 <= 6.6.*unaffected
LinuxLinux6.12.92 <= 6.12.*unaffected
LinuxLinux6.18.34 <= 6.18.*unaffected
LinuxLinux7.0.11 <= 7.0.*unaffected
LinuxLinux7.1 <= *unaffected

Weaknesses

References