CVE-2024-53237

Kernel memory corruption via delayed Bluetooth reparenting

Published Dec 27, 2024 · Updated Aug 5, 2026

Use-after-free in Linux Bluetooth HCI teardown allows local users to corrupt kernel memory by removing a controller during delayed reparenting. hci_conn_del_sysfs() calls device_unregister() while extra kobject references can defer reparenting, allowing the parent hciX controller to be freed before device_for_each_child() follows the stale parent pointer. Reachability requires a kernel built with CONFIG_BT and control of Bluetooth device teardown; the demonstrated result is an invalid kernel-memory read, while broader code execution was not demonstrated.

CVSS severity7.8
High
EPSS probability0.32%
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 Bluetooth HCI teardown allows local users to corrupt kernel memory by removing a controller during delayed reparenting. hci_conn_del_sysfs() calls device_unregister() while extra kobject references can defer reparenting, allowing the parent hciX controller to be freed before device_for_each_child() follows the stale parent pointer. Reachability requires a kernel built with CONFIG_BT and control of Bluetooth device teardown; the demonstrated result is an invalid kernel-memory read, while broader code execution was not demonstrated.

The record

CVE
CVE-2024-53237
Published
Dec 27, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 27, 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=3c4236f1b2a715e878a06599fa8b0cc21f165d28 <6894717a1ea363c5a27010ba604f957c309d282d
  2. Affected versionversion=4.19.300 <4.20
  3. Affected versionversion=5.10.202 <5.10.231
  4. Affected versionversion=5.15.140 <5.15.174
  5. Affected versionversion=53d61daf35b1bbf3ae06e852ee107aa2f05b3776 <fb91ce37dc9a37ea23cf32b6d7b667004e93d4c5
  6. Affected versionversion=5.4.262 <5.4.297
  7. Affected versionversion=56a4fdde95ed98d864611155f6728983e199e198 <de5a44f351ca7efd9add9851b218f5353e2224b7
  8. Affected versionversion=5c53afc766e07098429520b7677eaa164b593451
  9. Affected versionversion=6.1.64 <6.1.120
  10. Affected versionversion=6.5.13 <6.6
  11. Affected versionversion=6.6.3 <6.6.64
  12. Affected versionversion=6.7
  13. Affected versionversion=87624b1f9b781549e69f92db7ede012a21cec275 <0f67ca2a80acf8b207240405b7f72d660665d3df
  14. Affected versionversion=a85fb91e3d728bdfc80833167e8162cce8bc7004 <27aabf27fd014ae037cc179c61b0bee7cff55b3d
  15. Affected versionversion=a85fb91e3d728bdfc80833167e8162cce8bc7004 <7b277bd569bb6a2777f0014f84b4344f444fd49d
  16. Affected versionversion=a85fb91e3d728bdfc80833167e8162cce8bc7004 <91e2a2e4d1336333804cd31162984f01ad8cc70f
  17. Affected versionversion=ba7088769800d9892a7e4f35c3137a5b3e65410b <a9584c897d1cba6265c78010bbb45ca5722c88bc
  18. Affected versionversion=fc666d1b47518a18519241cae213de1babd4a4ba

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3c4236f1b2a715e878a06599fa8b0cc21f165d28 <6894717a1ea363c5a27010ba604f957c309d282d; version=4.19.300 <4.20; version=5.10.202 <5.10.231; version=5.15.140 <5.15.174; version=53d61daf35b1bbf3ae06e852ee107aa2f05b3776 <fb91ce37dc9a37ea23cf32b6d7b667004e93d4c5; version=5.4.262 <5.4.297; version=56a4fdde95ed98d864611155f6728983e199e198 <de5a44f351ca7efd9add9851b218f5353e2224b7; version=5c53afc766e07098429520b7677eaa164b593451; version=6.1.64 <6.1.120; version=6.5.13 <6.6; version=6.6.3 <6.6.64; version=6.7; version=87624b1f9b781549e69f92db7ede012a21cec275 <0f67ca2a80acf8b207240405b7f72d660665d3df; version=a85fb91e3d728bdfc80833167e8162cce8bc7004 <27aabf27fd014ae037cc179c61b0bee7cff55b3d; version=a85fb91e3d728bdfc80833167e8162cce8bc7004 <7b277bd569bb6a2777f0014f84b4344f444fd49d; version=a85fb91e3d728bdfc80833167e8162cce8bc7004 <91e2a2e4d1336333804cd31162984f01ad8cc70f; version=ba7088769800d9892a7e4f35c3137a5b3e65410b <a9584c897d1cba6265c78010bbb45ca5722c88bc; version=fc666d1b47518a18519241cae213de1babd4a4ba

Published CVSS scores

7.8Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8CanonicalCVSS:3.1/AV:L/AC:L/PR:L/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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free

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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