CVE-2024-47664: spi: hisi-kunpeng: Add verification for the max_frequency provided by the firmware

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-10-09 · updated 2026-10-30
Weakness: CWE-369

Description

In the Linux kernel, the following vulnerability has been resolved: spi: hisi-kunpeng: Add verification for the max_frequency provided by the firmware If the value of max_speed_hz is 0, it may cause a division by zero error in hisi_calc_effective_speed(). The value of max_speed_hz is provided by firmware. Firmware is generally considered as a trusted domain. However, as division by zero errors can cause system failure, for defense measure, the value of max_speed is validated here. So 0 is regarded as invalid and an error code is returned.

Affected products

Linux kernel: before 6.6.51; from 6.7 before 6.10.10; 6.11-rc1, 6.11-rc2 — fixed in 6.6.51, 6.10.10
Linux: 5.13 — fixed in 6.11

How to fix

Upgrade to a fixed version: Linux kernel 6.6.51, 6.10.10; Linux 6.11. Check the vendor advisory for mitigations.

References

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