CVE-2024-49950

Kernel compromise via L2CAP connection use-after-free

Published Oct 21, 2024 · Updated Aug 5, 2026

Use-after-free in the Linux kernel Bluetooth L2CAP stack allows remote attackers within Bluetooth range to crash the kernel. The l2cap_connect_req path dereferences an l2cap_conn after a concurrent connection abort frees it; the fix moves management notification before L2CAP processing under the HCI device lock. An unauthenticated, unpaired BR/EDR peer can control the request-and-teardown race, resulting in kernel memory disclosure, corruption, control-flow hijacking, or a panic.

CVSS severity8.8
High
EPSS probability0.37%
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 Bluetooth L2CAP stack allows remote attackers within Bluetooth range to crash the kernel. The l2cap_connect_req path dereferences an l2cap_conn after a concurrent connection abort frees it; the fix moves management notification before L2CAP processing under the HCI device lock. An unauthenticated, unpaired BR/EDR peer can control the request-and-teardown race, resulting in kernel memory disclosure, corruption, control-flow hijacking, or a panic.

The record

CVE
CVE-2024-49950
Published
Oct 21, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1210
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 21, 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=3.8
  2. Affected versionversion=7b064edae38d62d8587a8c574f93b53ce75ae749 <333b4fd11e89b29c84c269123f871883a30be586
  3. Affected versionversion=7b064edae38d62d8587a8c574f93b53ce75ae749 <686e05c9dbd68766c6bda5f31f7e077f36a7fb29
  4. Affected versionversion=7b064edae38d62d8587a8c574f93b53ce75ae749 <78d30ce16fdf9c301bcd8b83ce613cea079cea83
  5. Affected versionversion=7b064edae38d62d8587a8c574f93b53ce75ae749 <a1c6174e23df10b8e5770e82d63bc6e2118a3dc7
  6. Affected versionversion=7b064edae38d62d8587a8c574f93b53ce75ae749 <b22346eec479a30bfa4a02ad2c551b54809694d0
  7. Affected versionversion=7b064edae38d62d8587a8c574f93b53ce75ae749 <b90907696c30172b809aa3dd2f0caffae761e4c6

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.8; version=7b064edae38d62d8587a8c574f93b53ce75ae749 <333b4fd11e89b29c84c269123f871883a30be586; version=7b064edae38d62d8587a8c574f93b53ce75ae749 <686e05c9dbd68766c6bda5f31f7e077f36a7fb29; version=7b064edae38d62d8587a8c574f93b53ce75ae749 <78d30ce16fdf9c301bcd8b83ce613cea079cea83; version=7b064edae38d62d8587a8c574f93b53ce75ae749 <a1c6174e23df10b8e5770e82d63bc6e2118a3dc7; version=7b064edae38d62d8587a8c574f93b53ce75ae749 <b22346eec479a30bfa4a02ad2c551b54809694d0; version=7b064edae38d62d8587a8c574f93b53ce75ae749 <b90907696c30172b809aa3dd2f0caffae761e4c6

Published CVSS scores

7.8Canonical UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.8Linux CNACVSS: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

T1210Exploitation of Remote Services

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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