CVE-2026-80762

Kernel use-after-free read via Bluetooth accept-list race

Published Sep 4, 2026 · Updated Sep 4, 2026

Use-after-free in Linux kernel Bluetooth HCI suspend handling allows attackers to trigger an invalid read through an accept-list race. hci_update_event_filter_sync() retains an accept-list node across a synchronous controller wait while remove_device() can delete and free that node under a different lock. The race requires Bluetooth suspend processing and concurrent accept-list removal; the published result is a KASAN-detected eight-byte kernel read, with no demonstrated code execution or disclosure.

CVSS severityUnavailable
Unscored
EPSS probability0.17%
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 Linux kernel Bluetooth HCI suspend handling allows attackers to trigger an invalid read through an accept-list race. hci_update_event_filter_sync() retains an accept-list node across a synchronous controller wait while remove_device() can delete and free that node under a different lock. The race requires Bluetooth suspend processing and concurrent accept-list removal; the published result is a KASAN-detected eight-byte kernel read, with no demonstrated code execution or disclosure.

The record

CVE
CVE-2026-80762
Published
Sep 4, 2026
Updated
Sep 4, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 4, 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=182ee45da083db4e3e621541ccf255bfa9652214 <29c59212a507804d7616b8abf491d30b4ab8e75f
  2. Affected versionversion=182ee45da083db4e3e621541ccf255bfa9652214 <87ad116ac3abc6f2ce2b5b6c488f633003581eee
  3. Affected versionversion=182ee45da083db4e3e621541ccf255bfa9652214 <95bb57bc11a91caf042ad00fca85e480d3fda37f
  4. Affected versionversion=182ee45da083db4e3e621541ccf255bfa9652214 <b5181516a9f5c2fdb3271cdad72a5b16c6963a44
  5. Affected versionversion=182ee45da083db4e3e621541ccf255bfa9652214 <bb5f5414d1a6272a16f68684e998f4063dd19f57
  6. Affected versionversion=182ee45da083db4e3e621541ccf255bfa9652214 <f57b399c4fa1501b2d5451f52d861ece86bcf3db
  7. Affected versionversion=182ee45da083db4e3e621541ccf255bfa9652214 <fe93a697a7a92fa9adf78c9ff67a10db3193290c
  8. Affected versionversion=5.17

What conditions does exploitation require?

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

What is affected?

The Linux Kernel Organization · Linuxversion=182ee45da083db4e3e621541ccf255bfa9652214 <29c59212a507804d7616b8abf491d30b4ab8e75f; version=182ee45da083db4e3e621541ccf255bfa9652214 <87ad116ac3abc6f2ce2b5b6c488f633003581eee; version=182ee45da083db4e3e621541ccf255bfa9652214 <95bb57bc11a91caf042ad00fca85e480d3fda37f; version=182ee45da083db4e3e621541ccf255bfa9652214 <b5181516a9f5c2fdb3271cdad72a5b16c6963a44; version=182ee45da083db4e3e621541ccf255bfa9652214 <bb5f5414d1a6272a16f68684e998f4063dd19f57; version=182ee45da083db4e3e621541ccf255bfa9652214 <f57b399c4fa1501b2d5451f52d861ece86bcf3db; version=182ee45da083db4e3e621541ccf255bfa9652214 <fe93a697a7a92fa9adf78c9ff67a10db3193290c; version=5.17

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free

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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