Acknowledged
Created: Sep 7, 2025
Updated: Sep 9, 2025
Found In Version: 10.22.33.1
Severity: Standard
Applicable for: Wind River Linux LTS 22
Component/s: Kernel
In the Linux kernel, the following vulnerability has been resolved:EOL][EOL]x86/cpu/hygon: Add missing resctrl_cpu_detect() in bsp_init helper[EOL][EOL]Since[EOL][EOL] 923f3a2b48bd ("x86/resctrl: Query LLC monitoring properties once during boot")[EOL][EOL]resctrl_cpu_detect() has been moved from common CPU initialization code to[EOL]the vendor-specific BSP init helper, while Hygon didn't put that call in their[EOL]code.[EOL][EOL]This triggers a division by zero fault during early booting stage on our[EOL]machines with X86_FEATURE_CQM* supported, where get_rdt_mon_resources() tries[EOL]to calculate mon_l3_config with uninitialized boot_cpu_data.x86_cache_occ_scale.[EOL][EOL]Add the missing resctrl_cpu_detect() in the Hygon BSP init helper.[EOL][EOL] [ bp: Massage commit message. ]
CREATE(Triage):(User=admin) [CVE-2025-39681 (https://nvd.nist.gov/vuln/detail/CVE-2025-39681)
