CVE-2026-72414

Kernel division by zero via truncated PTP period

Published Aug 15, 2026 · Updated Aug 15, 2026

Division by zero in the Linux SJA1105 DSA driver allows local users to invoke future_base_time via a tiny PTP perout period. The driver converts the requested period to hardware ticks without rounding, so sub-tick values become zero and are passed as cycle_time. Reachability requires local access to the PTP character device and an SJA1105 switch exposing a configurable periodic-output pin; the bounded consequence is a kernel division by zero.

CVSS severityUnavailable
Unscored
EPSS probability0.22%
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 SJA1105 DSA driver allows local users to invoke future_base_time via a tiny PTP perout period. The driver converts the requested period to hardware ticks without rounding, so sub-tick values become zero and are passed as cycle_time. Reachability requires local access to the PTP character device and an SJA1105 switch exposing a configurable periodic-output pin; the bounded consequence is a kernel division by zero.

The record

CVE
CVE-2026-72414
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
Unavailable

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=5.7
  2. Affected versionversion=747e5eb31d59d047972a0dab03e5430fe4264332 <09efce96c909dff1a9317ec3714b7ddb4751b7af
  3. Affected versionversion=747e5eb31d59d047972a0dab03e5430fe4264332 <201dcbbfb27f3db85c8cf125a75f3164a83ceb32
  4. Affected versionversion=747e5eb31d59d047972a0dab03e5430fe4264332 <28d13a89a211cc07caeef32069eaa847131b7351
  5. Affected versionversion=747e5eb31d59d047972a0dab03e5430fe4264332 <410629528067029096dba7ad7bc49e4a5e92708d
  6. Affected versionversion=747e5eb31d59d047972a0dab03e5430fe4264332 <9952291db7125b8a62bf19800b93dcac81fc70c0
  7. Affected versionversion=747e5eb31d59d047972a0dab03e5430fe4264332 <aaf446099ca497c8d9a8e511fedf5d0e547bf8ec
  8. Affected versionversion=747e5eb31d59d047972a0dab03e5430fe4264332 <aee5836273b07b439fb245fb43930664d8b78518
  9. Affected versionversion=747e5eb31d59d047972a0dab03e5430fe4264332 <fc62bfd30d30af07356f0f7121c826e1e753582f

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=5.7; version=747e5eb31d59d047972a0dab03e5430fe4264332 <09efce96c909dff1a9317ec3714b7ddb4751b7af; version=747e5eb31d59d047972a0dab03e5430fe4264332 <201dcbbfb27f3db85c8cf125a75f3164a83ceb32; version=747e5eb31d59d047972a0dab03e5430fe4264332 <28d13a89a211cc07caeef32069eaa847131b7351; version=747e5eb31d59d047972a0dab03e5430fe4264332 <410629528067029096dba7ad7bc49e4a5e92708d; version=747e5eb31d59d047972a0dab03e5430fe4264332 <9952291db7125b8a62bf19800b93dcac81fc70c0; version=747e5eb31d59d047972a0dab03e5430fe4264332 <aaf446099ca497c8d9a8e511fedf5d0e547bf8ec; version=747e5eb31d59d047972a0dab03e5430fe4264332 <aee5836273b07b439fb245fb43930664d8b78518; version=747e5eb31d59d047972a0dab03e5430fe4264332 <fc62bfd30d30af07356f0f7121c826e1e753582f

Published CVSS scores

No CVSS assessment is available in this record.

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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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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