Vulnerability identifier: #VU92887

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-2022-48763

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_vcpu_ioctl_x86_set_vcpu_events() function in arch/x86/kvm/x86.c, within the nested_vmx_hardware_setup() function in arch/x86/kvm/vmx/nested.c, within the svm_set_efer() function in arch/x86/kvm/svm/svm.c, within the svm_free_nested() and svm_set_nested_state() functions in arch/x86/kvm/svm/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:

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External links
http://git.kernel.org/stable/c/080dbe7e9b86a0392d8dffc00d9971792afc121f
http://git.kernel.org/stable/c/e302786233e6bc512986d007c96458ccf5ca21c7
http://git.kernel.org/stable/c/b4c0d89c92e957ecccce12e66b63875d0cc7af7e
http://git.kernel.org/stable/c/f7e570780efc5cec9b2ed1e0472a7da14e864fdb

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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.