CVE-2025-39681— x86/cpu/hygon: Add missing resctrl_cpu_detect() in bsp_init helper
Affected Version Matrix 16
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 923f3a2b48bdccb6a1d1f0dd48de03de7ad936d9< 62f12cde10118253348a7540e85606869bd69432 | affected |
923f3a2b48bdccb6a1d1f0dd48de03de7ad936d9< 873f32201df8876bdb2563e3187e79149427cab4 | affected | ||
923f3a2b48bdccb6a1d1f0dd48de03de7ad936d9< fb81222c1559f89bfe3aa1010f6d112531d55353 | affected | ||
923f3a2b48bdccb6a1d1f0dd48de03de7ad936d9< 7207923d8453ebfb35667c1736169f2dd796772e | affected | ||
923f3a2b48bdccb6a1d1f0dd48de03de7ad936d9< a9e5924daa954c9f585c1ca00358afe71d6781c4 | affected | ||
923f3a2b48bdccb6a1d1f0dd48de03de7ad936d9< d23264c257a70dbe021b43b3bc2ee16134cd2c69 | affected | ||
923f3a2b48bdccb6a1d1f0dd48de03de7ad936d9< d8df126349dad855cdfedd6bbf315bad2e901c2f | affected | ||
5.8 | affected | ||
| … +8 more rows | |||
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I. Basic Information for CVE-2025-39681
Vulnerability Information
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Vulnerability Title
x86/cpu/hygon: Add missing resctrl_cpu_detect() in bsp_init helper
Source: NVD (National Vulnerability Database)
Vulnerability 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. ]
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于缺少resctrl_cpu_detect调用，可能导致除零错误。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2025-39681
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · Linux · 2025-09-05 · 60 CVEs total
| CVE-2025-39707 | drm/amdgpu: check if hubbub is NULL in debugfs/amdgpu_dm_capabilities | |
| CVE-2025-39725 | mm/vmscan: fix hwpoisoned large folio handling in shrink_folio_list | |
| CVE-2025-39722 | crypto: caam - Prevent crash on suspend with iMX8QM / iMX8ULP | |
| CVE-2025-39721 | crypto: qat - flush misc workqueue during device shutdown | |
| CVE-2025-39720 | ksmbd: fix refcount leak causing resource not released | |
| CVE-2025-39723 | netfs: Fix unbuffered write error handling | |
| CVE-2025-39711 | media: ivsc: Fix crash at shutdown due to missing mei_cldev_disable() calls | |
| CVE-2025-39710 | media: venus: Add a check for packet size after reading from shared memory | |
| CVE-2025-39709 | media: venus: protect against spurious interrupts during probe | |
| CVE-2025-39708 | media: iris: Fix NULL pointer dereference | |
| CVE-2025-39712 | media: mt9m114: Fix deadlock in get_frame_interval/set_frame_interval | |
| CVE-2025-39706 | drm/amdkfd: Destroy KFD debugfs after destroy KFD wq | |
| CVE-2025-39705 | drm/amd/display: fix a Null pointer dereference vulnerability | |
| CVE-2025-39704 | LoongArch: KVM: Fix stack protector issue in send_ipi_data() | |
| CVE-2025-39703 | net, hsr: reject HSR frame if skb can't hold tag | |
| CVE-2025-39702 | ipv6: sr: Fix MAC comparison to be constant-time | |
| CVE-2025-39701 | ACPI: pfr_update: Fix the driver update version check | |
| CVE-2025-39700 | mm/damon/ops-common: ignore migration request to invalid nodes | |
| CVE-2025-39699 | iommu/riscv: prevent NULL deref in iova_to_phys | |
| CVE-2025-39698 | io_uring/futex: ensure io_futex_wait() cleans up properly on failure |
Showing top 20 of 60 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-46333
ptrace: slightly saner 'get_dumpable()' logic - CVE-2026-43490
ksmbd: validate inherited ACE SID length - CVE-2026-43489
liveupdate: luo_file: remember retrieve() status - CVE-2026-43487
ata: libata-core: Disable LPM on ST1000DM010-2EP102 - CVE-2026-43488
usb: xhci: Prevent interrupt storm on host controller error
Same vendor: Linux
- CVE-2026-46333
ptrace: slightly saner 'get_dumpable()' logic - CVE-2026-43490
ksmbd: validate inherited ACE SID length - CVE-2026-43489
liveupdate: luo_file: remember retrieve() status - CVE-2026-43487
ata: libata-core: Disable LPM on ST1000DM010-2EP102 - CVE-2026-43488
usb: xhci: Prevent interrupt storm on host controller error
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