VDB
DEBIAN-CVE-2025-39681
DEBIAN-CVE-2025-39681
PUBLISHED
CVSS 5.5 MEDIUM
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. ]
Risk Scores
CVSS v3.1
5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:14 | linux | 6.13.7-1~exp1, 0, 6.13~rc7-1~exp1 |
| Debian:11 | linux-6.1 | *, *, 6.1.148-1 |
| Debian:12 | linux | 6.1.66-1, 0, 6.1.106-3 |
| Debian:11 | linux | 5.10.158-1, 5.10.103-1, 5.10.162-1 |
| Debian:13 | linux | 6.12.43-1, 6.12.43-1, 6.12.41-1 |
Timeline
- Sep 5, 2025 CVE Published
- Apr 28, 2026 CVE Updated