PT-2025-36276 · Hygon+6 · Hygon+6
Published
2025-01-01
·
Updated
2026-05-26
·
CVE-2025-39681
CVSS v3.1
5.5
Medium
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel versions prior to 923f3a2b48bd
Description
A division by zero fault can occur during the early booting stage on machines with X86 FEATURE CQM* supported. This is due to
get rdt mon resources() attempting to calculate mon l3 config with an uninitialized boot cpu data.x86 cache occ scale. The issue arises because resctrl cpu detect() was moved to a vendor-specific BSP init helper but was not implemented in Hygon’s code.Recommendations
Update the Linux kernel to a version after commit 923f3a2b48bd.
Exploit
Fix
Divide By Zero
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Weakness Enumeration
Related Identifiers
Affected Products
Debian
Hygon
Linuxmint
Linux Kernel
Red Os
Suse
Ubuntu