Vulnerability identifier: #VU89930

Vulnerability 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-2021-47545

CWE-ID: CWE-401

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

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

The vulnerability exists due to memory leak within the fmt_free(), perf_hpp__init() and perf_hpp_list__prepend_sort_field() functions in tools/perf/ui/hist.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel:

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External links
http://git.kernel.org/stable/c/c5c8a26c0dc69a400553245e92d741fe55f91095
http://git.kernel.org/stable/c/24a139c105fa0f7f99888cf328bf6a02fc841675
http://git.kernel.org/stable/c/b380d09e44e8479e71e3ae8446b515a5b3166244
http://git.kernel.org/stable/c/a4c17ebdd6249cb4e061358d3693383f6628e069
http://git.kernel.org/stable/c/5b5c6f57a1f81499db4c8ea597898cb1b87de0b6
http://git.kernel.org/stable/c/0ca1f534a776cc7d42f2c33da4732b74ec2790cd

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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.