Resource management error in Linux kernel kvm vmx



| Updated: 2025-05-13
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-46978
CWE-ID CWE-399
Exploitation vector Local
Public exploit N/A
Vulnerable software
 Linux kernel
Operating systems & Components / Operating system

Vendor Linux Foundation

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Resource management error

EUVDB-ID: #VU93274

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-46978

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

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 nested_get_evmcs_page(), nested_get_vmcs12_pages() and nested_vmx_vmexit() functions in arch/x86/kvm/vmx/nested.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.10 - 5.13 rc5

CPE2.3 External links

https://git.kernel.org/stable/c/c8bf64e3fb77cc19bad146fbe26651985b117194
https://git.kernel.org/stable/c/200a45649ab7361bc80c70aebf7165b64f9a6c9f
https://git.kernel.org/stable/c/bd0e8455b85b651a4c77de9616e307129b15aaa7
https://git.kernel.org/stable/c/f5c7e8425f18fdb9bdb7d13340651d7876890329
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.38
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.22
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.5
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13


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.



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