CVE-2024-54191

System hang via Bluetooth ISO lock inversion

Published Jan 11, 2025 · Updated May 23, 2026

Improper locking in the Linux kernel Bluetooth ISO subsystem allows local users to hang the system through an ISO socket read. iso_sock_recvmsg retains the Bluetooth socket lock while calling iso_conn_big_sync, which takes hdev->lock in the reverse order of an existing dependency. Reaching the flaw requires local low-privileged access and an affected Bluetooth ISO path; successful triggering can deadlock the kernel and halt service.

CVSS severity5.5
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper locking in the Linux kernel Bluetooth ISO subsystem allows local users to hang the system through an ISO socket read. iso_sock_recvmsg retains the Bluetooth socket lock while calling iso_conn_big_sync, which takes hdev->lock in the reverse order of an existing dependency. Reaching the flaw requires local low-privileged access and an affected Bluetooth ISO path; successful triggering can deadlock the kernel and halt service.

The record

CVE
CVE-2024-54191
Published
Jan 11, 2025
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-667, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 11, 2025CVE 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=07a9342b94a91b306ed1cf6aa8254aea210764c9 <7a17308c17880d259105f6e591eb1bc77b9612f0
  2. Affected versionversion=1360e5b6ce63d63d23223a659ca2bbafa30a53aa <cbe640d6cae590b9a7d81ce86fe9a90e83eec1d5
  3. Affected versionversion=6.11.11 <6.12
  4. Affected versionversion=6.12.2 <6.12.6
  5. Affected versionversion=bfec1e55314896bf4a4cfdb3a9ad4872be9f06ed

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=07a9342b94a91b306ed1cf6aa8254aea210764c9 <7a17308c17880d259105f6e591eb1bc77b9612f0; version=1360e5b6ce63d63d23223a659ca2bbafa30a53aa <cbe640d6cae590b9a7d81ce86fe9a90e83eec1d5; version=6.11.11 <6.12; version=6.12.2 <6.12.6; version=bfec1e55314896bf4a4cfdb3a9ad4872be9f06ed

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NIST NVDCVSS: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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-667Improper Locking
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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