CVE-2025-39681

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-39681
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. ]

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/62f12cde10118253348a7540e85606869bd69432 Patch
https://git.kernel.org/stable/c/7207923d8453ebfb35667c1736169f2dd796772e Patch
https://git.kernel.org/stable/c/873f32201df8876bdb2563e3187e79149427cab4 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/fb81222c1559f89bfe3aa1010f6d112531d55353 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
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
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:*:*:*:*:*:*

Configuration 2 (hide)

cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
History

08 Jan 2026, 15:33

Type Values Removed Values Added
CWE NVD-CWE-noinfo
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
First Time Linux
Debian
Debian debian Linux
Linux linux Kernel
References () https://git.kernel.org/stable/c/62f12cde10118253348a7540e85606869bd69432 - () https://git.kernel.org/stable/c/62f12cde10118253348a7540e85606869bd69432 - Patch
References () https://git.kernel.org/stable/c/7207923d8453ebfb35667c1736169f2dd796772e - () https://git.kernel.org/stable/c/7207923d8453ebfb35667c1736169f2dd796772e - Patch
References () https://git.kernel.org/stable/c/873f32201df8876bdb2563e3187e79149427cab4 - () https://git.kernel.org/stable/c/873f32201df8876bdb2563e3187e79149427cab4 - Patch
References () https://git.kernel.org/stable/c/a9e5924daa954c9f585c1ca00358afe71d6781c4 - () https://git.kernel.org/stable/c/a9e5924daa954c9f585c1ca00358afe71d6781c4 - Patch
References () https://git.kernel.org/stable/c/d23264c257a70dbe021b43b3bc2ee16134cd2c69 - () https://git.kernel.org/stable/c/d23264c257a70dbe021b43b3bc2ee16134cd2c69 - Patch
References () https://git.kernel.org/stable/c/d8df126349dad855cdfedd6bbf315bad2e901c2f - () https://git.kernel.org/stable/c/d8df126349dad855cdfedd6bbf315bad2e901c2f - Patch
References () https://git.kernel.org/stable/c/fb81222c1559f89bfe3aa1010f6d112531d55353 - () https://git.kernel.org/stable/c/fb81222c1559f89bfe3aa1010f6d112531d55353 - Patch
References () https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html - () https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html - Third Party Advisory
References () https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html - () https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html - Third Party Advisory
CPE cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.17:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

03 Nov 2025, 18:16

Type Values Removed Values Added
References
  • () https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html -
  • () https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html -

08 Sep 2025, 07:15

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/62f12cde10118253348a7540e85606869bd69432 -

05 Sep 2025, 18:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-09-05 18:15

Updated : 2026-01-08 15:33

NVD link : CVE-2025-39681

Mitre link : CVE-2025-39681

CVE.ORG link : CVE-2025-39681

JSON object : View

Products Affected

debian

  • debian_linux

linux

  • linux_kernel
CWE
NVD-CWE-noinfo