Vulnerability identifier: #VU91630

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-2021-47296

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 kvm_arch_vcpu_ioctl() function in arch/powerpc/kvm/powerpc.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/9bafc34dc4ad0cef18727c557f21ed3c3304df50
http://git.kernel.org/stable/c/f38527f1890543cdfca8dfd06f75f9887cce6151
http://git.kernel.org/stable/c/e14ef1095387f764d95614d3ec9e4d07c82a3533
http://git.kernel.org/stable/c/a4a488915feaad38345cc01b80d52e8200ff5209
http://git.kernel.org/stable/c/bc4188a2f56e821ea057aca6bf444e138d06c252

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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.