CVE-2026-80680

Unspecified impact via stale MP2 callback dereference

Published Aug 28, 2026 · Updated Aug 28, 2026

Use-after-free in the Linux kernel allows attackers to cause unspecified impact after AMD MP2 adapter registration fails. amd_mp2_register_cb() saves the platform I2C context before i2c_add_adapter() succeeds, but a failed probe frees that context without clearing the PCI callback table. Reachability requires an AMD MP2 controller, an adapter-add failure, and a later IRQ or system-sleep callback; the source does not establish attacker control or a specific consequence beyond stale-pointer dereference.

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

Use-after-free in the Linux kernel allows attackers to cause unspecified impact after AMD MP2 adapter registration fails. amd_mp2_register_cb() saves the platform I2C context before i2c_add_adapter() succeeds, but a failed probe frees that context without clearing the PCI callback table. Reachability requires an AMD MP2 controller, an adapter-add failure, and a later IRQ or system-sleep callback; the source does not establish attacker control or a specific consequence beyond stale-pointer dereference.

The record

CVE
CVE-2026-80680
Published
Aug 28, 2026
Updated
Aug 28, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 28, 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=5.2
  2. Affected versionversion=529766e0a0114438887382a68d97341fbf8349fb <1883a09a37fed497b9efacf736c23624a472246b
  3. Affected versionversion=529766e0a0114438887382a68d97341fbf8349fb <2f7789b3a9628819ebf90bcba8f9da3c139f8687
  4. Affected versionversion=529766e0a0114438887382a68d97341fbf8349fb <4786d4d70dcd1e6b7e044f2348e00f201947b69c
  5. Affected versionversion=529766e0a0114438887382a68d97341fbf8349fb <82048795242f04275a3f49ffc66ad851b6120954
  6. Affected versionversion=529766e0a0114438887382a68d97341fbf8349fb <8bf719659406e4a1b56d441e0c7da2085d891d96
  7. Affected versionversion=529766e0a0114438887382a68d97341fbf8349fb <9142a3dcff0d80a3a24ce159aee19ddc869d9784
  8. Affected versionversion=529766e0a0114438887382a68d97341fbf8349fb <b7c2c5c8868737926410b93d1223ada17625ead3
  9. Affected versionversion=529766e0a0114438887382a68d97341fbf8349fb <cf107c5983dc70fcf932a305581a5f976d908ff1

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=5.2; version=529766e0a0114438887382a68d97341fbf8349fb <1883a09a37fed497b9efacf736c23624a472246b; version=529766e0a0114438887382a68d97341fbf8349fb <2f7789b3a9628819ebf90bcba8f9da3c139f8687; version=529766e0a0114438887382a68d97341fbf8349fb <4786d4d70dcd1e6b7e044f2348e00f201947b69c; version=529766e0a0114438887382a68d97341fbf8349fb <82048795242f04275a3f49ffc66ad851b6120954; version=529766e0a0114438887382a68d97341fbf8349fb <8bf719659406e4a1b56d441e0c7da2085d891d96; version=529766e0a0114438887382a68d97341fbf8349fb <9142a3dcff0d80a3a24ce159aee19ddc869d9784; version=529766e0a0114438887382a68d97341fbf8349fb <b7c2c5c8868737926410b93d1223ada17625ead3; version=529766e0a0114438887382a68d97341fbf8349fb <cf107c5983dc70fcf932a305581a5f976d908ff1

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

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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)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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