SB2024082237 - Improper locking in Linux kernel kvm mmu
Published: August 22, 2024 Updated: May 12, 2025
Security Bulletin ID
SB2024082237
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper locking (CVE-ID: CVE-2022-48943)
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.
Remediation
Install update from vendor's website.
References
- 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