SB2025090885 - Use of uninitialized resource in Linux kernel kernel cpu
Published: September 8, 2025
Security Bulletin ID
SB2025090885
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) Use of uninitialized resource (CVE-ID: CVE-2025-39681)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to use of uninitialized resource within the bsp_init_hygon() function in arch/x86/kernel/cpu/hygon.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/7207923d8453ebfb35667c1736169f2dd796772e
- https://git.kernel.org/stable/c/873f32201df8876bdb2563e3187e79149427cab4
- https://git.kernel.org/stable/c/a9e5924daa954c9f585c1ca00358afe71d6781c4
- https://git.kernel.org/stable/c/d23264c257a70dbe021b43b3bc2ee16134cd2c69
- https://git.kernel.org/stable/c/d8df126349dad855cdfedd6bbf315bad2e901c2f
- https://git.kernel.org/stable/c/fb81222c1559f89bfe3aa1010f6d112531d55353