CVE-2022-50374

Local system crash via uninitialized Bluetooth semaphore

Published Sep 17, 2025 · Updated Sep 17, 2025

A null-pointer dereference in Linux kernel Bluetooth HCI UART handling allows local users to crash affected systems during device closure. hci_uart_tty_open() ignores percpu_init_rwsem() failure, so hci_uart_tty_close() later calls rcu_sync_enter() without prior rcu_sync_init(). Triggering the allocation-failure path and then closing the affected HCI UART device requires local low-privileged access and interrupts system availability.

CVSS severity5.5
Medium
EPSS probability0.20%
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 Linux kernel Bluetooth HCI UART handling allows local users to crash affected systems during device closure. hci_uart_tty_open() ignores percpu_init_rwsem() failure, so hci_uart_tty_close() later calls rcu_sync_enter() without prior rcu_sync_init(). Triggering the allocation-failure path and then closing the affected HCI UART device requires local low-privileged access and interrupts system availability.

The record

CVE
CVE-2022-50374
Published
Sep 17, 2025
Updated
Sep 17, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-908, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 17, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 2025Record 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=4.15
  2. Affected versionversion=4a53c4e84ace1bc75157a7281af3fe8f5b19d08c
  3. Affected versionversion=67d2f8781b9f00d1089aafcfa3dc09fcd0f343e2 <3124d320c22f3f4388d9ac5c8f37eaad0cefd6b1
  4. Affected versionversion=67d2f8781b9f00d1089aafcfa3dc09fcd0f343e2 <75b2c71ea581c7bb1303860d89366a42ad0506d2
  5. Affected versionversion=67d2f8781b9f00d1089aafcfa3dc09fcd0f343e2 <98ce10f3f345e61fc6c83bff9cd11cda252b05ac
  6. Affected versionversion=67d2f8781b9f00d1089aafcfa3dc09fcd0f343e2 <b8917dce2134739b39bc0a5648b18427f2cad569
  7. Affected versionversion=67d2f8781b9f00d1089aafcfa3dc09fcd0f343e2 <d7cc0d51ffcbfd1caaa809fcf9cff05c46d0fb4d
  8. Affected versionversion=f6ec33f6bd3723a8146768106434ef6ab3d9d990

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.15; version=4a53c4e84ace1bc75157a7281af3fe8f5b19d08c; version=67d2f8781b9f00d1089aafcfa3dc09fcd0f343e2 <3124d320c22f3f4388d9ac5c8f37eaad0cefd6b1; version=67d2f8781b9f00d1089aafcfa3dc09fcd0f343e2 <75b2c71ea581c7bb1303860d89366a42ad0506d2; version=67d2f8781b9f00d1089aafcfa3dc09fcd0f343e2 <98ce10f3f345e61fc6c83bff9cd11cda252b05ac; version=67d2f8781b9f00d1089aafcfa3dc09fcd0f343e2 <b8917dce2134739b39bc0a5648b18427f2cad569; version=67d2f8781b9f00d1089aafcfa3dc09fcd0f343e2 <d7cc0d51ffcbfd1caaa809fcf9cff05c46d0fb4d; version=f6ec33f6bd3723a8146768106434ef6ab3d9d990

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

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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-908Use of Uninitialized Resource
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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