SB2025022791 - NULL pointer dereference in Linux kernel x86 kvm
Published: February 27, 2025 Updated: May 11, 2025
Security Bulletin ID
SB2025022791
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-2025-21779)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the kvm_hv_send_ipi() and kvm_get_hv_cpuid() functions in arch/x86/kvm/hyperv.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/5393cf22312418262679eaadb130d608c75fe690
- https://git.kernel.org/stable/c/874ff13c73c45ecb38cb82191e8c1d523f0dc81b
- https://git.kernel.org/stable/c/a8de7f100bb5989d9c3627d3a223ee1c863f3b69
- https://git.kernel.org/stable/c/aca8be4403fb90db7adaf63830e27ebe787a76e8
- https://git.kernel.org/stable/c/ca29f58ca374c40a0e69c5306fc5c940a0069074
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.13.4