CVE-2024-47664

System crash via zero firmware clock rate

Published Oct 9, 2024 · Updated May 11, 2026

Division by zero in the Linux kernel allows local users to crash affected systems through a zero SPI clock value supplied by firmware. During driver probe, hisi_spi_probe accepts a firmware-derived max_speed_hz of zero; hisi_calc_effective_speed then masks its derived clk_div to zero and divides by it. Reachability is limited to systems using the HiSilicon Kunpeng SPI driver whose firmware reports zero; the resulting kernel fault interrupts the system.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Division by zero in the Linux kernel allows local users to crash affected systems through a zero SPI clock value supplied by firmware. During driver probe, hisi_spi_probe accepts a firmware-derived max_speed_hz of zero; hisi_calc_effective_speed then masks its derived clk_div to zero and divides by it. Reachability is limited to systems using the HiSilicon Kunpeng SPI driver whose firmware reports zero; the resulting kernel fault interrupts the system.

The record

CVE
CVE-2024-47664
Published
Oct 9, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-369, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 9, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.13
  2. Affected versionversion=c770d8631e1810d8f1ce21b18ad5dd67eeb39e5c <16ccaf581da4fcf1e4d66086cf37263f9a656d43
  3. Affected versionversion=c770d8631e1810d8f1ce21b18ad5dd67eeb39e5c <5127c42c77de18651aa9e8e0a3ced190103b449c
  4. Affected versionversion=c770d8631e1810d8f1ce21b18ad5dd67eeb39e5c <ee73a15d4a8ce8fb02d7866f7cf78fcdd16f0fcc

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.13; version=c770d8631e1810d8f1ce21b18ad5dd67eeb39e5c <16ccaf581da4fcf1e4d66086cf37263f9a656d43; version=c770d8631e1810d8f1ce21b18ad5dd67eeb39e5c <5127c42c77de18651aa9e8e0a3ced190103b449c; version=c770d8631e1810d8f1ce21b18ad5dd67eeb39e5c <ee73a15d4a8ce8fb02d7866f7cf78fcdd16f0fcc

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-369Divide By Zero
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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