CVE-2026-64147

Local system crash via debugfs dentry mishandling

Published Jul 19, 2026 · Updated Jul 19, 2026

Denial of service in Linux Kernel pds_core on affected releases allows local users to crash the system during firmware reset recovery. The recovery path drops debugfs_lookup() dentries without dput(), leaking a reference per reset, and treats ERR_PTR(-ENODEV) as a valid dentry when debugfs is disabled. The fault requires the pds_core driver and a firmware reset; repeated recoveries consume resources, while debugfs-disabled kernels can crash immediately.

CVSS severityUnavailable
Unscored
EPSS probability0.13%
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 Linux Kernel pds_core on affected releases allows local users to crash the system during firmware reset recovery. The recovery path drops debugfs_lookup() dentries without dput(), leaking a reference per reset, and treats ERR_PTR(-ENODEV) as a valid dentry when debugfs is disabled. The fault requires the pds_core driver and a firmware reset; repeated recoveries consume resources, while debugfs-disabled kernels can crash immediately.

The record

CVE
CVE-2026-64147
Published
Jul 19, 2026
Updated
Jul 19, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-772, T1499.004
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Jul 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 19, 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=2bbf2b1c20f934a054172175ccbabcc01fe69ef6 <60ef1675b652e912f3eb064767af4432393291fd
  2. Affected versionversion=3ffe14c36985e3174933127c9efad82ac8f3fefb
  3. Affected versionversion=6.6.16 <6.6.142
  4. Affected versionversion=6.7.4 <6.8
  5. Affected versionversion=6.8
  6. Affected versionversion=bc90fbe0c3182157d2be100a2f6c2edbb1820677 <26e19622c485e53c3fdb299e822068a0542ddf0c
  7. Affected versionversion=bc90fbe0c3182157d2be100a2f6c2edbb1820677 <91d13e92b983e6c6d7631012c2e20ae8057de9f2
  8. Affected versionversion=bc90fbe0c3182157d2be100a2f6c2edbb1820677 <d7f4dd4c8fb380898fef7a77d48fce7ccdb4fc32
  9. Affected versionversion=bc90fbe0c3182157d2be100a2f6c2edbb1820677 <dc416e32baaeb620b9809e9e25fc7b30889686e9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linux Kernelversion=2bbf2b1c20f934a054172175ccbabcc01fe69ef6 <60ef1675b652e912f3eb064767af4432393291fd; version=3ffe14c36985e3174933127c9efad82ac8f3fefb; version=6.6.16 <6.6.142; version=6.7.4 <6.8; version=6.8; version=bc90fbe0c3182157d2be100a2f6c2edbb1820677 <26e19622c485e53c3fdb299e822068a0542ddf0c; version=bc90fbe0c3182157d2be100a2f6c2edbb1820677 <91d13e92b983e6c6d7631012c2e20ae8057de9f2; version=bc90fbe0c3182157d2be100a2f6c2edbb1820677 <d7f4dd4c8fb380898fef7a77d48fce7ccdb4fc32; version=bc90fbe0c3182157d2be100a2f6c2edbb1820677 <dc416e32baaeb620b9809e9e25fc7b30889686e9

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.

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

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

CWE-772Missing Release of Resource after Effective Lifetime
T1499.004Application 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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