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
Affected Vendors & Products
References
History
Thu, 08 Jan 2026 15:45:00 +0000
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| First Time appeared |
Debian
Debian debian Linux |
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| Weaknesses | NVD-CWE-noinfo | |
| CPEs | cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.17:rc2:*:*:*:*:*:* |
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| Vendors & Products |
Debian
Debian debian Linux |
Mon, 03 Nov 2025 18:30:00 +0000
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| References |
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Mon, 08 Sep 2025 06:30:00 +0000
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| References |
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Sun, 07 Sep 2025 16:00:00 +0000
| Type | Values Removed | Values Added |
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| First Time appeared |
Linux
Linux linux Kernel |
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| Vendors & Products |
Linux
Linux linux Kernel |
Sat, 06 Sep 2025 00:15:00 +0000
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| References |
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| Metrics |
threat_severity
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cvssV3_1
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Fri, 05 Sep 2025 17:30:00 +0000
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| 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. ] | |
| Title | x86/cpu/hygon: Add missing resctrl_cpu_detect() in bsp_init helper | |
| References |
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Status: PUBLISHED
Assigner: Linux
Published:
Updated: 2025-11-03T17:42:12.739Z
Reserved: 2025-04-16T07:20:57.113Z
Link: CVE-2025-39681
No data.
Status : Analyzed
Published: 2025-09-05T18:15:44.537
Modified: 2026-01-08T15:33:38.437
Link: CVE-2025-39681
OpenCVE Enrichment
Updated: 2025-09-07T15:47:30Z