SB20240531375 - NULL pointer dereference in Linux kernel x86 kvm
Published: May 31, 2024 Updated: May 14, 2025
Security Bulletin ID
SB20240531375
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) NULL pointer dereference (CVE-ID: CVE-2021-47230)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the emulator_get_hflags() function in arch/x86/kvm/x86.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/cbb425f62df9df7abee4b3f068f7ed6ffc3561e2
- https://git.kernel.org/stable/c/669a8866e468fd020d34eb00e08cb41d3774b71b
- https://git.kernel.org/stable/c/df9a40cfb3be2cbeb1c17bb67c59251ba16630f3
- https://git.kernel.org/stable/c/78fcb2c91adfec8ce3a2ba6b4d0dda89f2f4a7c6
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.46
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.13
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.128