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NVD / CVE Program· CNA Linux

CVE-2026-74547: hwmon: (adt7470) Fix busy-loop and I2C flooding in update thread

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.17% (FIRST EPSS).
  • Fixed version: Linux Linux 1325975a2eab265510e6036d8bf0c0068373d332, 1a42bd72a66205e439db1d1142442b62d393408a, 2c4c4d7cadd10b50b5489183bbbb9eb95f6f8344; azl3 kernel 6.6.150.1-1 on Azure Linux 3.0 6.6.152.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 1325975a2eab265510e6036d8bf0c0068373d332, 1a42bd72a66205e439db1d1142442b62d393408a, 2c4c4d7cadd10b50b5489183bbbb9eb95f6f8344; azl3 kernel 6.6.150.1-1 on Azure Linux 3.0 6.6.152.1-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: hwmon: (adt7470) Fix busy-loop and I2C flooding in update thread When userspace configures 'auto_update_interval' to 0 via sysfs, the background kthread executes schedule_timeout_interruptible(0), which returns immediately. If 'num_temp_sensors' is concurrently or previously set to 0, the msleep_interruptible() delay inside adt7470_read_temperatures() also becomes 0. This combination forces the background thread into a tight, unbounded busy-loop, hogging the CPU and flooding the I2C bus with a continuous stream of transactions. Fix this vulnerability by raising the lower limit of the clamp_val in auto_update_interval_store() from 0 to 500 milliseconds. This guarantees a reasonable minimum sleep window between sensor updates, protecting the system from intentional or accidental I2C bus denial of service.

—No exploit Fix available
Published
Aug 15, 2026
Updated
Nov 6, 2026
EPSS
0.1% · 7th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 2.6.29affected
    • 89fac11cb3e7c5860c425dba14845c09ccede39d and later · before 2c4c4d7cadd10b50b5489183bbbb9eb95f6f8344affected · git
    • 89fac11cb3e7c5860c425dba14845c09ccede39d and later · before 4dc1518f9cc57c6db99514cafeb02dd7117d5bdaaffected · git
    • 89fac11cb3e7c5860c425dba14845c09ccede39d and later · before 1325975a2eab265510e6036d8bf0c0068373d332affected · git
    • 89fac11cb3e7c5860c425dba14845c09ccede39d and later · before 1a42bd72a66205e439db1d1142442b62d393408aaffected · git
    • 89fac11cb3e7c5860c425dba14845c09ccede39d and later · before 38e6b5ce5794ff09442231cc171c2be5e900bab3affected · git
    • 89fac11cb3e7c5860c425dba14845c09ccede39d and later · before 82d65f7ef11edcea0228745440b8b4b1f222c34caffected · git
    • 89fac11cb3e7c5860c425dba14845c09ccede39d and later · before 5ea299c3aa42a827f6a863eeead6de3525bbb17aaffected · git
    • 89fac11cb3e7c5860c425dba14845c09ccede39d and later · before cb0b7f9c43b0abbd422a7e4c2c85e91db429207caffected · git
    • before 2.6.29not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.187-16.1.187-1
Debian:12linux-6.12before 6.12.107-1~deb12u16.12.107-1~deb12u1
Debian:13linuxbefore 6.12.105-16.12.105-1
Debian:14linuxbefore 7.1.8-17.1.8-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-74544Aug 15, 2026 · net/sched: cls_u32: validate offshift to prevent shift-out-of-bounds
    31Monitor
  • ← EarlierCVE-2026-74546Aug 15, 2026 · hwmon: (adt7470) Fix divide-by-zero TOCTOU crash in fan speed read
    0Monitor
  • Later →CVE-2026-74548Aug 15, 2026 · forcedeth: fix UAF of txrx_stats in nv_remove
    31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux1325975a2eab265510e6036d8bf0c0068373d332Vendor (CNA)
Linux Linux1a42bd72a66205e439db1d1142442b62d393408aVendor (CNA)
Linux Linux2c4c4d7cadd10b50b5489183bbbb9eb95f6f8344Vendor (CNA)
Linux Linux38e6b5ce5794ff09442231cc171c2be5e900bab3Vendor (CNA)
Linux Linux4dc1518f9cc57c6db99514cafeb02dd7117d5bdaVendor (CNA)
Linux Linux5ea299c3aa42a827f6a863eeead6de3525bbb17aVendor (CNA)
Linux Linux82d65f7ef11edcea0228745440b8b4b1f222c34cVendor (CNA)
Linux Linuxcb0b7f9c43b0abbd422a7e4c2c85e91db429207cVendor (CNA)
azl3 kernel 6.6.150.1-1 on Azure Linux 3.06.6.152.1-1 · Release NotesMicrosoft (MSRC)
debian:linux6.1.187-1 · Debian:12Package registry (OSV)
debian:linux-6.126.12.107-1~deb12u1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. SSVC exploitation— → none
  2. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records