// For flags

CVE-2021-47058

regmap: set debugfs_name to NULL after it is freed

Severity Score

5.1
*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track
*SSVC
Descriptions

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.

En el kernel de Linux, se resolvió la siguiente vulnerabilidad: regmap: establece debugfs_name en NULL después de liberarlo. Hay una confirmación ascendente cffa4b2122f5("regmap:debugfs: corrige una pérdida de memoria al llamar a regmap_attach_dev") que agrega una condición if al crear nombre para debugfs_name. Con la siguiente función que invoca lógica, debugfs_name se libera en regmap_debugfs_exit(), pero no se vuelve a crear debido a la condición if introducida por la confirmación anterior. regmap_reinit_cache() regmap_debugfs_exit() ... regmap_debugfs_init() Entonces, establezca debugfs_name en NULL después de liberarlo.

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.

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
High
Attack Vector
Local
Attack Complexity
Low
Authentication
Multiple
Confidentiality
Partial
Integrity
None
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:Track
Exploitation
None
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2024-02-29 CVE Reserved
  • 2024-02-29 CVE Published
  • 2024-12-17 EPSS Updated
  • 2024-12-19 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 4.19.168 < 4.19.191
Search vendor "Linux" for product "Linux Kernel" and version " >= 4.19.168 < 4.19.191"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 5.4.90 < 5.4.119
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.4.90 < 5.4.119"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 5.10.8 < 5.10.37
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.10.8 < 5.10.37"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 5.11 < 5.11.21
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.11 < 5.11.21"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 5.11 < 5.12.4
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.11 < 5.12.4"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 5.11 < 5.13
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.11 < 5.13"
en
Affected