Vulnerability identifier: #VU94487

Vulnerability risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/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-2021-47623

CWE-ID: CWE-399

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 resource management error within the set_pte_at() function in arch/powerpc/mm/pgtable.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/67baac10dd5ad1e9f50e8f2659984b3b0728d54e
http://git.kernel.org/stable/c/43ae0ccc4d2722b833fb59b905af129428e06d03
http://git.kernel.org/stable/c/033fd42c18d9b2121595b6f1e8419a115f9ac5b7
http://git.kernel.org/stable/c/aec982603aa8cc0a21143681feb5f60ecc69d718

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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.