Memory leak in Linux kernel regmap driver

1) Memory leak

EUVDB-ID: #VU90031

Risk: Low

CVSSv3.1: 4.8 [AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-47058

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to memory leak within the regmap_debugfs_exit() function in drivers/base/regmap/regmap-debugfs.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

External links

http://git.kernel.org/stable/c/2dc1554d5f0fdaf47cc5bea442b84b9226fea867
http://git.kernel.org/stable/c/d8897f7b2283a500666c85ef06e820df38ed7b52
http://git.kernel.org/stable/c/eb949f891226c012138ffd9df90d1e509f428ae6
http://git.kernel.org/stable/c/c764e375ae647832de1ee73d43a4bb3ef8a8f43d
http://git.kernel.org/stable/c/b9e569ae1da3a113b3acee8703c94777fd20938a
http://git.kernel.org/stable/c/e41a962f82e7afb5b1ee644f48ad0b3aee656268

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.