CVE-2024-26959

Kernel service interruption via incomplete Bluetooth cleanup

Published May 1, 2024 · Updated May 11, 2026

Denial of service in the Linux btnxpuart driver allows local users to trigger a kernel scheduling BUG during Bluetooth shutdown. btnxpuart_close leaves queued transmit packets and a receive buffer live while closing the serial device, permitting deferred work to run in an atomic HCI power-off context. Reachability requires an NXP UART Bluetooth controller and local ability to shut down its HCI device; the observed consequence is a kernel BUG and service interruption.

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

Denial of service in the Linux btnxpuart driver allows local users to trigger a kernel scheduling BUG during Bluetooth shutdown. btnxpuart_close leaves queued transmit packets and a receive buffer live while closing the serial device, permitting deferred work to run in an atomic HCI power-off context. Reachability requires an NXP UART Bluetooth controller and local ability to shut down its HCI device; the observed consequence is a kernel BUG and service interruption.

The record

CVE
CVE-2024-26959
Published
May 1, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 1, 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

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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=6.4
  2. Affected versionversion=689ca16e523278470c38832a3010645a78c544d8 <586e099c93fe26b7bd40593979532f507ed9f6a4
  3. Affected versionversion=689ca16e523278470c38832a3010645a78c544d8 <664130c0b0309b360bc5bdd40a30604a9387bde8
  4. Affected versionversion=689ca16e523278470c38832a3010645a78c544d8 <74bcf708775c405f7fb6ed776ccd3e1957f38a52
  5. Affected versionversion=689ca16e523278470c38832a3010645a78c544d8 <d4e2365b07f1ae1f811a915b514caef5b2d6581e

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.4; version=689ca16e523278470c38832a3010645a78c544d8 <586e099c93fe26b7bd40593979532f507ed9f6a4; version=689ca16e523278470c38832a3010645a78c544d8 <664130c0b0309b360bc5bdd40a30604a9387bde8; version=689ca16e523278470c38832a3010645a78c544d8 <74bcf708775c405f7fb6ed776ccd3e1957f38a52; version=689ca16e523278470c38832a3010645a78c544d8 <d4e2365b07f1ae1f811a915b514caef5b2d6581e

Published CVSS scores

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 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

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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