CVE-2026-74553

Service interruption via oversized temperature register count

Published Aug 15, 2026 · Updated Aug 15, 2026

An out-of-bounds read in affected Linux kernels allows local users to interrupt service when the NCT6116 hwmon driver probes. nct6775_probe sets the NCT6116 register count from a six-entry NCT6106 array, then reads past its three temperature-source entries. Reachability requires Linux on NCT6116 hardware and loading the nct6775 module; the reported consequence is an out-of-bounds read with availability impact, not disclosed data access or code execution.

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

What happened

An out-of-bounds read in affected Linux kernels allows local users to interrupt service when the NCT6116 hwmon driver probes. nct6775_probe sets the NCT6116 register count from a six-entry NCT6106 array, then reads past its three temperature-source entries. Reachability requires Linux on NCT6116 hardware and loading the nct6775 module; the reported consequence is an out-of-bounds read with availability impact, not disclosed data access or code execution.

The record

CVE
CVE-2026-74553
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=29c7cb485b321c024dedc168bcbb04451176b163 <16c45bb3d3434cfb9ea264fa52090d0823240465
  2. Affected versionversion=29c7cb485b321c024dedc168bcbb04451176b163 <9a87dfaa05c3c9d3a4cdb7eafc1ab4abc84f6eef
  3. Affected versionversion=29c7cb485b321c024dedc168bcbb04451176b163 <a42d727dae5701deac8bb2a75effadae7d681153
  4. Affected versionversion=29c7cb485b321c024dedc168bcbb04451176b163 <a7f47f5246cd6c3199e5fb2d4109cc53e766e3f0
  5. Affected versionversion=29c7cb485b321c024dedc168bcbb04451176b163 <b0e8adb2ccb43009796897ced09f91636685c9d3
  6. Affected versionversion=5.4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=29c7cb485b321c024dedc168bcbb04451176b163 <16c45bb3d3434cfb9ea264fa52090d0823240465; version=29c7cb485b321c024dedc168bcbb04451176b163 <9a87dfaa05c3c9d3a4cdb7eafc1ab4abc84f6eef; version=29c7cb485b321c024dedc168bcbb04451176b163 <a42d727dae5701deac8bb2a75effadae7d681153; version=29c7cb485b321c024dedc168bcbb04451176b163 <a7f47f5246cd6c3199e5fb2d4109cc53e766e3f0; version=29c7cb485b321c024dedc168bcbb04451176b163 <b0e8adb2ccb43009796897ced09f91636685c9d3; version=5.4

Published CVSS scores

5.5OracleCVSS: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 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

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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