CVE-2021-47058
Linux Kernel Regmap Memory Leak
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.
INFO
Published Date :
Feb. 29, 2024, 11:15 p.m.
Last Modified :
March 1, 2024, 2:04 p.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
Exploitability Score :
References to Advisories, Solutions, and Tools
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CVE-2021-47058.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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The following list is the news that have been mention
CVE-2021-47058 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-47058 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 28, 2024
Action Type Old Value New Value -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 14, 2024
Action Type Old Value New Value -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Feb. 29, 2024
Action Type Old Value New Value Added 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. Added Reference Linux https://git.kernel.org/stable/c/2dc1554d5f0fdaf47cc5bea442b84b9226fea867 [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/d8897f7b2283a500666c85ef06e820df38ed7b52 [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/eb949f891226c012138ffd9df90d1e509f428ae6 [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/c764e375ae647832de1ee73d43a4bb3ef8a8f43d [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/b9e569ae1da3a113b3acee8703c94777fd20938a [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/e41a962f82e7afb5b1ee644f48ad0b3aee656268 [No types assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-47058 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-47058
weaknesses.