#VU104603 NULL pointer dereference in Linux kernel - CVE-2022-49568

Vulnerability identifier: #VU104603

Vulnerability 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-2022-49568

CWE-ID: CWE-476

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 NULL pointer dereference within the kvm_ioctl_create_device() function in virt/kvm/kvm_main.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

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External links
https://git.kernel.org/stable/c/170465715a60cbb7876e6b961b21bd3225469da8
https://git.kernel.org/stable/c/3616776bc51cd3262bb1be60cc01c72e0a1959cf
https://git.kernel.org/stable/c/d4a5a79b780891c5cbdfdc6124d46fdf8d13dba1
https://git.kernel.org/stable/c/e8bc2427018826e02add7b0ed0fc625a60390ae5
https://git.kernel.org/stable/c/e91665fbbf3ccb268b268a7d71a6513538d813ac

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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.