CVE-2024-36013

Kernel memory corruption via L2CAP channel race

Published May 23, 2024 · Updated Aug 5, 2026

Use-after-free in the Linux Bluetooth L2CAP handler allows physically proximate attackers to corrupt kernel memory through a channel race. l2cap_connect releases conn->chan_lock before reading and updating chan, while l2cap_conn_del can free that channel under the same lock. An unpaired device within Bluetooth range can repeat the race without credentials or user interaction, causing kernel memory disclosure or corruption and a kernel panic.

CVSS severity8.8
High
EPSS probability0.47%
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 Bluetooth L2CAP handler allows physically proximate attackers to corrupt kernel memory through a channel race. l2cap_connect releases conn->chan_lock before reading and updating chan, while l2cap_conn_del can free that channel under the same lock. An unpaired device within Bluetooth range can repeat the race without credentials or user interaction, causing kernel memory disclosure or corruption and a kernel panic.

The record

CVE
CVE-2024-36013
Published
May 23, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1203
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 23, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=3.0
  2. Affected versionversion=73ffa904b78287f6acf8797e040150aa26a4af4a <4d7b41c0e43995b0e992b9f8903109275744b658
  3. Affected versionversion=73ffa904b78287f6acf8797e040150aa26a4af4a <826af9d2f69567c646ff46d10393d47e30ad23c6
  4. Affected versionversion=73ffa904b78287f6acf8797e040150aa26a4af4a <8629a65a48890769c47ebc9b6e57c02a80a8975e
  5. Affected versionversion=73ffa904b78287f6acf8797e040150aa26a4af4a <cfe560c7050bfb37b0d2491bbe7cd8b59e77fdc5

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.0; version=73ffa904b78287f6acf8797e040150aa26a4af4a <4d7b41c0e43995b0e992b9f8903109275744b658; version=73ffa904b78287f6acf8797e040150aa26a4af4a <826af9d2f69567c646ff46d10393d47e30ad23c6; version=73ffa904b78287f6acf8797e040150aa26a4af4a <8629a65a48890769c47ebc9b6e57c02a80a8975e; version=73ffa904b78287f6acf8797e040150aa26a4af4a <cfe560c7050bfb37b0d2491bbe7cd8b59e77fdc5

Published CVSS scores

6.8CanonicalCVSS:3.1/AV:A/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
8.8kernel.orgCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1203Exploitation for Client Execution

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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