Incorrect calculation in Linux kernel include nvhe

1) Incorrect calculation

EUVDB-ID: #VU93753

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-2021-47450

CWE-ID: CWE-682 - Incorrect Calculation

Exploit availability: No

Description

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

The vulnerability exists due to incorrect calculation within the hyp_get_page() function in arch/arm64/kvm/hyp/nvhe/page_alloc.c, within the host_s2_zalloc_pages_exact() function in arch/arm64/kvm/hyp/nvhe/mem_protect.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

CPE2.3

External links

http://git.kernel.org/stable/c/b372264c66ef78f2cab44e877fbd765ad6d24c39
http://git.kernel.org/stable/c/1d58a17ef54599506d44c45ac95be27273a4d2b1

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.