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high7.8

CVE-2021-47058

In the Linux kernel, the following vulnerability has been resolved: regmap: set debugfs_name to NULL after it is freed There is a upstream commit cffa4b2122f5(…

Impact

In the Linux kernel, the following vulnerability has been resolved: regmap: set debugfs_name to NULL after it is freed There is a upstream commit cffa4b2122f5("regmap:debugfs: Fix a memory leak when calling regmap_attach_dev") that adds a if condition when create name for debugfs_name. With below function invoking logical, debugfs_name is freed in regmap_debugfs_exit(), but it is not created again because of the if condition introduced by above commit. regmap_reinit_cache() regmap_debugfs_exit() ... regmap_debugfs_init() So, set debugfs_name to NULL after it is freed.

Affected products

VendorProductAffected versions
LinuxLinux Kernel
from 4.19.168 before 4.19.191
from 5.4.90 before 5.4.119
from 5.10.8 before 5.10.37
from 5.11 before 5.11.21
from 5.12 before 5.12.4

Weakness classification

CWE-416

References