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CVE-2024-26993

In the Linux kernel, the following vulnerability has been resolved: fs: sysfs: Fix reference leak in sysfs_break_active_protection() The sysfs_break_active_pro…

Impact

In the Linux kernel, the following vulnerability has been resolved: fs: sysfs: Fix reference leak in sysfs_break_active_protection() The sysfs_break_active_protection() routine has an obvious reference leak in its error path. If the call to kernfs_find_and_get() fails then kn will be NULL, so the companion sysfs_unbreak_active_protection() routine won't get called (and would only cause an access violation by trying to dereference kn->parent if it was called). As a result, the reference to kobj acquired at the start of the function will never be released. Fix the leak by adding an explicit kobject_put() call when kn is NULL.

Affected products

VendorProductAffected versions
LinuxLinux Kernel
from 3.16.62 before 3.17
from 3.18.121 before 3.19
from 4.4.154 before 4.5
from 4.9.125 before 4.10
from 4.14.68 before 4.15
from 4.18.6 before 4.19

References