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PUBLISHED

CVE-2021-47058

regmap: set debugfs_name to NULL after it is freed

Reserved:2024-02-29
Published:2024-02-29
Updated:2024-04-04

Description

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.

Product status

Default status
unaffected

5b654b030079 before 2dc1554d5f0f
affected

480c5e9c7e4c before d8897f7b2283
affected

c9698380b01a before eb949f891226
affected

cffa4b2122f5 before c764e375ae64
affected

cffa4b2122f5 before b9e569ae1da3
affected

cffa4b2122f5 before e41a962f82e7
affected

Default status
affected

5.11
affected

Any version before 5.11
unaffected

4.19.191
unaffected

5.4.119
unaffected

5.10.37
unaffected

5.11.21
unaffected

5.12.4
unaffected

5.13
unaffected

References

https://git.kernel.org/stable/c/2dc1554d5f0fdaf47cc5bea442b84b9226fea867

https://git.kernel.org/stable/c/d8897f7b2283a500666c85ef06e820df38ed7b52

https://git.kernel.org/stable/c/eb949f891226c012138ffd9df90d1e509f428ae6

https://git.kernel.org/stable/c/c764e375ae647832de1ee73d43a4bb3ef8a8f43d

https://git.kernel.org/stable/c/b9e569ae1da3a113b3acee8703c94777fd20938a

https://git.kernel.org/stable/c/e41a962f82e7afb5b1ee644f48ad0b3aee656268

cve.org CVE-2021-47058

nvd.nist.gov CVE-2021-47058

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