CVE-2026-74685

Service interruption via current-limit integer overflow

Published Aug 22, 2026 · Updated Aug 22, 2026

Integer overflow in the ltc4282 hwmon driver in Linux allows local users to cause a service interrupt through a negative current limit. ltc4282_write_curr() casts the signed value to u64, then truncates the division result to u32, so ltc4282_write_voltage_byte() applies the maximum limit instead of zero. Reachability requires local access and an attached LTC4282 device exposed by the driver; the incorrect maximum limit can destabilize the hardware.

CVSS severity5.5
Medium
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Integer overflow in the ltc4282 hwmon driver in Linux allows local users to cause a service interrupt through a negative current limit. ltc4282_write_curr() casts the signed value to u64, then truncates the division result to u32, so ltc4282_write_voltage_byte() applies the maximum limit instead of zero. Reachability requires local access and an attached LTC4282 device exposed by the driver; the incorrect maximum limit can destabilize the hardware.

The record

CVE
CVE-2026-74685
Published
Aug 22, 2026
Updated
Aug 22, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-190, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 22, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=6.9
  2. Affected versionversion=cbc29538dbf7d7400f1ffc5dd5713e6a551463a0 <046e56b53c09375ef39903514496aa5508db9729
  3. Affected versionversion=cbc29538dbf7d7400f1ffc5dd5713e6a551463a0 <60e06c4dba696173982393252a40ceb7dd2eec18
  4. Affected versionversion=cbc29538dbf7d7400f1ffc5dd5713e6a551463a0 <de58b90a4d1417c15b693eb04c0ce6bc925d84c6
  5. Affected versionversion=cbc29538dbf7d7400f1ffc5dd5713e6a551463a0 <e253dd5f9f6d875a317895bf43ec9534ed7523cb

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.9; version=cbc29538dbf7d7400f1ffc5dd5713e6a551463a0 <046e56b53c09375ef39903514496aa5508db9729; version=cbc29538dbf7d7400f1ffc5dd5713e6a551463a0 <60e06c4dba696173982393252a40ceb7dd2eec18; version=cbc29538dbf7d7400f1ffc5dd5713e6a551463a0 <de58b90a4d1417c15b693eb04c0ce6bc925d84c6; version=cbc29538dbf7d7400f1ffc5dd5713e6a551463a0 <e253dd5f9f6d875a317895bf43ec9534ed7523cb

Published CVSS scores

5.5Red HatCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-190Integer Overflow or Wraparound
T1499Endpoint Denial of Service

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo