Vulnerability identifier: #VU96433

Vulnerability risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/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-2022-48943

CWE-ID: CWE-667

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 improper locking within the shadow_page_table_clear_flood() function in arch/x86/kvm/mmu/mmu.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel:

---

External links
http://git.kernel.org/stable/c/72fdfc75d4217b32363cc80def3de2cb3fef3f02
http://git.kernel.org/stable/c/4c3644b6c96c5daa5149e5abddc07234eea47c7c
http://git.kernel.org/stable/c/62040f5cd7d937de547836e747b6aa8212fec573
http://git.kernel.org/stable/c/6f3c1fc53d86d580d8d6d749c4af23705e4f6f79

---

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.