CVE-2026-46247

Kernel crash via missing parent clock mapping

Published Jun 3, 2026 · Updated Jun 3, 2026

Denial of service in affected Linux Kernel releases allows local users to crash the system during Qualcomm GFX3D clock-rate changes. The clk_gfx3d_determine_rate path passes a parent request map without the expected best_parent_hw clock, causing divider rate determination to crash. Reachability requires the Qualcomm GFX3D clock driver and a local rate-change path such as GPU devfreq; the bounded impact is a kernel crash and service interruption.

CVSS severity5.5
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in affected Linux Kernel releases allows local users to crash the system during Qualcomm GFX3D clock-rate changes. The clk_gfx3d_determine_rate path passes a parent request map without the expected best_parent_hw clock, causing divider rate determination to crash. Reachability requires the Qualcomm GFX3D clock driver and a local rate-change path such as GPU devfreq; the bounded impact is a kernel crash and service interruption.

The record

CVE
CVE-2026-46247
Published
Jun 3, 2026
Updated
Jun 3, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 3, 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=4.5
  2. Affected versionversion=55213e1acec9218580c90d36034aa0370a51daab <2583cb925ca1ce450aa5d74a05a67448db970193
  3. Affected versionversion=55213e1acec9218580c90d36034aa0370a51daab <547ae2f17349c7586953af5ef50de43ef3f65e9e
  4. Affected versionversion=55213e1acec9218580c90d36034aa0370a51daab <56360aa4ddd736fc19e6d0b0206c5e437e0d6ff8
  5. Affected versionversion=55213e1acec9218580c90d36034aa0370a51daab <82cfe5292b11deb1dc33822f67f73cfbe8eafe25
  6. Affected versionversion=55213e1acec9218580c90d36034aa0370a51daab <8aa972eba1f29068d13bec716d33abca30fb3f2a
  7. Affected versionversion=55213e1acec9218580c90d36034aa0370a51daab <aed53da569fb96eec09b4817b1953bcc2e467eea

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=4.5; version=55213e1acec9218580c90d36034aa0370a51daab <2583cb925ca1ce450aa5d74a05a67448db970193; version=55213e1acec9218580c90d36034aa0370a51daab <547ae2f17349c7586953af5ef50de43ef3f65e9e; version=55213e1acec9218580c90d36034aa0370a51daab <56360aa4ddd736fc19e6d0b0206c5e437e0d6ff8; version=55213e1acec9218580c90d36034aa0370a51daab <82cfe5292b11deb1dc33822f67f73cfbe8eafe25; version=55213e1acec9218580c90d36034aa0370a51daab <8aa972eba1f29068d13bec716d33abca30fb3f2a; version=55213e1acec9218580c90d36034aa0370a51daab <aed53da569fb96eec09b4817b1953bcc2e467eea

Published CVSS scores

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

T1499.004Application or System Exploitation

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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