#VU71582 Expected behavior violation in Linux kernel - CVE-2022-3344

Vulnerability identifier: #VU71582

Vulnerability risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-3344

CWE-ID: CWE-440

Exploitation vector: Network

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 an error in the KVM's AMD nested virtualization (SVM). A malicious L1 guest can purposely fail to intercept the shutdown of a cooperative nested guest (L2), possibly leading to a page fault and kernel panic in the host (L0).

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Linux kernel: before 6.1, 6.1

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External links
https://lore.kernel.org/lkml/20221020093055.224317-5-mlevitsk@redhat.com/T/
https://bugzilla.redhat.com/show_bug.cgi?id=2130278

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.