CVE-2026-80683

Kernel memory corruption via SCO reference underflow

Published Aug 28, 2026 · Updated Aug 28, 2026

Use-after-free in Linux kernel 6.13 Bluetooth SCO allows local users to corrupt kernel memory through a socket-close race. __sco_chan_add() stores a borrowed sco_conn pointer, while sco_conn_del() can issue an extra put after concurrent channel teardown frees it. Triggering requires an SCO connection and close() racing the controller's Disconnection Complete event; no privilege escalation has been published.

CVSS severityUnavailable
Unscored
EPSS probability0.24%
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 6.13 Bluetooth SCO allows local users to corrupt kernel memory through a socket-close race. __sco_chan_add() stores a borrowed sco_conn pointer, while sco_conn_del() can issue an extra put after concurrent channel teardown frees it. Triggering requires an SCO connection and close() racing the controller's Disconnection Complete event; no privilege escalation has been published.

The record

CVE
CVE-2026-80683
Published
Aug 28, 2026
Updated
Aug 28, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
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=6.13
  2. Affected versionversion=e6720779ae612a14ac4ba7fe4fd5b27d900d932c <8fe627192fa5da7157f9a48608f13c04b6373e43
  3. Affected versionversion=e6720779ae612a14ac4ba7fe4fd5b27d900d932c <a33bc07b4730b6cd5681ac77d18ae0de3e739690
  4. Affected versionversion=e6720779ae612a14ac4ba7fe4fd5b27d900d932c <abd93c85c8667add738ee82aeab95dd9fc8265a2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=6.13; version=e6720779ae612a14ac4ba7fe4fd5b27d900d932c <8fe627192fa5da7157f9a48608f13c04b6373e43; version=e6720779ae612a14ac4ba7fe4fd5b27d900d932c <a33bc07b4730b6cd5681ac77d18ae0de3e739690; version=e6720779ae612a14ac4ba7fe4fd5b27d900d932c <abd93c85c8667add738ee82aeab95dd9fc8265a2

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

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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