CVE-2024-56567

Local service interruption via unchecked zero denominator

Published Dec 27, 2024 · Updated May 11, 2026

Divide-by-zero in the AD7780 ADC driver in Linux allows local users to interrupt service via a zero scale denominator. The ad7780_write_raw() scale path passes an unchecked zero val2 value to DIV_ROUND_CLOSEST(), causing a processor division exception. Reachability requires local low-privilege access to the IIO write_raw interface and an AD7780-family device using the affected driver; the resulting exception affects availability only.

CVSS severity5.5
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Divide-by-zero in the AD7780 ADC driver in Linux allows local users to interrupt service via a zero scale denominator. The ad7780_write_raw() scale path passes an unchecked zero val2 value to DIV_ROUND_CLOSEST(), causing a processor division exception. Reachability requires local low-privilege access to the IIO write_raw interface and an AD7780-family device using the affected driver; the resulting exception affects availability only.

The record

CVE
CVE-2024-56567
Published
Dec 27, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-369, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 27, 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=5.2
  2. Affected versionversion=9085daa4abcc3a1c19ae4eb00e609842ef28275a <022e13518ba6cc1b4fdd291f49e4f57b2d5718e0
  3. Affected versionversion=9085daa4abcc3a1c19ae4eb00e609842ef28275a <18fb33df1de83a014d7f784089f9b124facc157f
  4. Affected versionversion=9085daa4abcc3a1c19ae4eb00e609842ef28275a <68e79b848196a0b0ec006009cc69da1f835d1ae8
  5. Affected versionversion=9085daa4abcc3a1c19ae4eb00e609842ef28275a <7e3a8ea3d1ada7f707de5d9d504774b4191eab66
  6. Affected versionversion=9085daa4abcc3a1c19ae4eb00e609842ef28275a <afc1e3c00b3f5f0b4f1bc3e974fb9803cb938a90
  7. Affected versionversion=9085daa4abcc3a1c19ae4eb00e609842ef28275a <c174b53e95adf2eece2afc56cd9798374919f99a
  8. Affected versionversion=9085daa4abcc3a1c19ae4eb00e609842ef28275a <f25a9f1df1f6738acf1fa05595fb6060a2c08ff1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.2; version=9085daa4abcc3a1c19ae4eb00e609842ef28275a <022e13518ba6cc1b4fdd291f49e4f57b2d5718e0; version=9085daa4abcc3a1c19ae4eb00e609842ef28275a <18fb33df1de83a014d7f784089f9b124facc157f; version=9085daa4abcc3a1c19ae4eb00e609842ef28275a <68e79b848196a0b0ec006009cc69da1f835d1ae8; version=9085daa4abcc3a1c19ae4eb00e609842ef28275a <7e3a8ea3d1ada7f707de5d9d504774b4191eab66; version=9085daa4abcc3a1c19ae4eb00e609842ef28275a <afc1e3c00b3f5f0b4f1bc3e974fb9803cb938a90; version=9085daa4abcc3a1c19ae4eb00e609842ef28275a <c174b53e95adf2eece2afc56cd9798374919f99a; version=9085daa4abcc3a1c19ae4eb00e609842ef28275a <f25a9f1df1f6738acf1fa05595fb6060a2c08ff1

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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