CVE-2024-53238

Kernel crash via uninitialized Bluetooth ISO anchor

Published Dec 27, 2024 · Updated May 11, 2026

NULL pointer dereference in the MediaTek Bluetooth USB driver in Linux allows local users to crash the kernel during device setup. btusb_mtk_claim_iso_intf fails to initialize isopkt_anchor when claiming the ISO interface, so disconnect cleanup passes the uninitialized anchor to usb_kill_anchored_urbs. Reachability requires low-privileged local access and an unexpected MediaTek Bluetooth USB disconnect during setup; the resulting impact is a kernel crash.

CVSS severity5.5
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in the MediaTek Bluetooth USB driver in Linux allows local users to crash the kernel during device setup. btusb_mtk_claim_iso_intf fails to initialize isopkt_anchor when claiming the ISO interface, so disconnect cleanup passes the uninitialized anchor to usb_kill_anchored_urbs. Reachability requires low-privileged local access and an unexpected MediaTek Bluetooth USB disconnect during setup; the resulting impact is a kernel crash.

The record

CVE
CVE-2024-53238
Published
Dec 27, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 27, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.11
  2. Affected versionversion=ceac1cb0259de682d78f5c784ef8e0b13022e9d9 <1219c211ccd061cde002cc5708692efca515a7a0
  3. Affected versionversion=ceac1cb0259de682d78f5c784ef8e0b13022e9d9 <61c5a3def90ac729a538e5ca5ff7f461cff72776
  4. Affected versionversion=ceac1cb0259de682d78f5c784ef8e0b13022e9d9 <d8bd79f0eea9c07d90ce870a714ab5c10afaa4b3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.11; version=ceac1cb0259de682d78f5c784ef8e0b13022e9d9 <1219c211ccd061cde002cc5708692efca515a7a0; version=ceac1cb0259de682d78f5c784ef8e0b13022e9d9 <61c5a3def90ac729a538e5ca5ff7f461cff72776; version=ceac1cb0259de682d78f5c784ef8e0b13022e9d9 <d8bd79f0eea9c07d90ce870a714ab5c10afaa4b3

Published CVSS scores

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

CWE-476NULL Pointer Dereference
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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