CVE-2024-42141

Kernel crash via deferred Bluetooth ISO socket

Published Jul 30, 2024 · Updated May 23, 2026

A null-pointer dereference in the Bluetooth ISO receive path of affected Linux kernels allows local users to crash the system. In iso_sock_recvmsg(), the BT_CONNECT2 fallback calls iso_conn_defer_accept() with pi->conn->hcon after the branch establishes that hcon can be null. Triggering the path requires low-privileged local access to a deferred Bluetooth ISO socket, and the resulting dereference interrupts availability by crashing the kernel.

CVSS severity5.5
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A null-pointer dereference in the Bluetooth ISO receive path of affected Linux kernels allows local users to crash the system. In iso_sock_recvmsg(), the BT_CONNECT2 fallback calls iso_conn_defer_accept() with pi->conn->hcon after the branch establishes that hcon can be null. Triggering the path requires low-privileged local access to a deferred Bluetooth ISO socket, and the resulting dereference interrupts availability by crashing the kernel.

The record

CVE
CVE-2024-42141
Published
Jul 30, 2024
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 30, 2024CVE publishedPublication date reported by the CVE source.
  2. May 23, 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=6.5.12 <6.6
  2. Affected versionversion=6.6
  3. Affected versionversion=c03a10bd5b6ccb22921e04bcddc987410df7e7a9
  4. Affected versionversion=fbdc4bc47268953c80853489f696e02d61f9a2c6 <045669710464a21c67e690ef14698fd71857cb11
  5. Affected versionversion=fbdc4bc47268953c80853489f696e02d61f9a2c6 <33fabef489169c6db87843ef23351ed0d5e51ad8
  6. Affected versionversion=fbdc4bc47268953c80853489f696e02d61f9a2c6 <596b6f081336e77764ca35cfeab66d0fcdbe544e

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.5.12 <6.6; version=6.6; version=c03a10bd5b6ccb22921e04bcddc987410df7e7a9; version=fbdc4bc47268953c80853489f696e02d61f9a2c6 <045669710464a21c67e690ef14698fd71857cb11; version=fbdc4bc47268953c80853489f696e02d61f9a2c6 <33fabef489169c6db87843ef23351ed0d5e51ad8; version=fbdc4bc47268953c80853489f696e02d61f9a2c6 <596b6f081336e77764ca35cfeab66d0fcdbe544e

Published CVSS scores

5.5UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

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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