5.5

CVE-2025-39681

x86/cpu/hygon: Add missing resctrl_cpu_detect() in bsp_init helper

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. ]
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 5.8 < 5.10.242
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.190
Linux ≫ Linux Kernel Version >= 5.16 < 6.1.149
Linux ≫ Linux Kernel Version >= 6.2 < 6.6.103
Linux ≫ Linux Kernel Version >= 6.7 < 6.12.44
Linux ≫ Linux Kernel Version >= 6.13 < 6.16.4
Linux ≫ Linux Kernel Version6.17 Updaterc1
Linux ≫ Linux Kernel Version6.17 Updaterc2
Debian ≫ Debian Linux Version11.0
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.16% 0.054
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Es wurden noch keine Informationen zu CWE veröffentlicht.
https://git.kernel.org/stable/c/873f32201df8876bdb2563e3187e79149427cab4
Patch
https://git.kernel.org/stable/c/fb81222c1559f89bfe3aa1010f6d112531d55353
Patch
https://git.kernel.org/stable/c/7207923d8453ebfb35667c1736169f2dd796772e
Patch
https://git.kernel.org/stable/c/a9e5924daa954c9f585c1ca00358afe71d6781c4
Patch
https://git.kernel.org/stable/c/d23264c257a70dbe021b43b3bc2ee16134cd2c69
Patch
https://git.kernel.org/stable/c/d8df126349dad855cdfedd6bbf315bad2e901c2f
Patch
https://git.kernel.org/stable/c/62f12cde10118253348a7540e85606869bd69432
Patch
https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
Third Party Advisory
https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
Third Party Advisory
https://cert-portal.siemens.com/productcert/html/ssa-032379.html