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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2025-39681 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: x86/cpu/hygon: Add missing resctrl_cpu_detect() in bsp_init helper Since 923f3a2b48bd ("x86/resctrl: Query LLC monitoring properties once during boot") resctrl_cpu_detect() has been moved from common CPU initialization code to the vendor-specific BSP init helper, while Hygon didn't put that call in their code. This triggers a division by zero fault during early booting stage on our machines with X86_FEATURE_CQM* supported, where get_rdt_mon_resources() tries to calculate mon_l3_config with uninitialized boot_cpu_data.x86_cache_occ_scale. Add the missing resctrl_cpu_detect() in the Hygon BSP init helper. [ bp: Massage commit message. ]


Metrics

 
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CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://cert-portal.siemens.com/productcert/html/ssa-032379.html siemens-SADP
https://git.kernel.org/stable/c/62f12cde10118253348a7540e85606869bd69432 kernel.org Patch 
https://git.kernel.org/stable/c/7207923d8453ebfb35667c1736169f2dd796772e kernel.org Patch 
https://git.kernel.org/stable/c/873f32201df8876bdb2563e3187e79149427cab4 kernel.org Patch 
https://git.kernel.org/stable/c/a9e5924daa954c9f585c1ca00358afe71d6781c4 kernel.org Patch 
https://git.kernel.org/stable/c/d23264c257a70dbe021b43b3bc2ee16134cd2c69 kernel.org Patch 
https://git.kernel.org/stable/c/d8df126349dad855cdfedd6bbf315bad2e901c2f kernel.org Patch 
https://git.kernel.org/stable/c/fb81222c1559f89bfe3aa1010f6d112531d55353 kernel.org Patch 
https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html CVE Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html CVE Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
NVD-CWE-noinfo Insufficient Information cwe source acceptance level NIST  

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Change History

5 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2025-39681
NVD Published Date:
09/05/2025
NVD Last Modified:
05/12/2026
Source:
kernel.org