Improper locking in Linux kernel - CVE-2022-48943
Published: August 22, 2024 / Updated: May 12, 2025
Vulnerability identifier: #VU96433
CSH Severity: Low
CVSS v4.0: 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-2022-48943
CWE-ID: CWE-667
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability 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.
How to mitigate CVE-2022-48943
Install update from vendor's website.
Sources
- https://git.kernel.org/stable/c/72fdfc75d4217b32363cc80def3de2cb3fef3f02
- https://git.kernel.org/stable/c/4c3644b6c96c5daa5149e5abddc07234eea47c7c
- https://git.kernel.org/stable/c/62040f5cd7d937de547836e747b6aa8212fec573
- https://git.kernel.org/stable/c/6f3c1fc53d86d580d8d6d749c4af23705e4f6f79
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.103
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.26
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16.12
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.17