SB20240531486 - NULL pointer dereference in Linux kernel x86 hyperv
Published: May 31, 2024 Updated: May 14, 2025
Security Bulletin ID
SB20240531486
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-2021-47217)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the set_hv_tscchange_cb() function in arch/x86/hyperv/hv_init.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/b20ec58f8a6f4fef32cc71480ddf824584e24743
- https://git.kernel.org/stable/c/b0e44dfb4e4c699cca33ede431b8d127e6e8d661
- https://git.kernel.org/stable/c/9c177eee116cf888276d3748cb176e72562cfd5c
- https://git.kernel.org/stable/c/8823ea27fff6084bbb4bc71d15378fae0220b1d8
- https://git.kernel.org/stable/c/daf972118c517b91f74ff1731417feb4270625a4
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.218
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.82
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.5
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.162