CVE-2022-50375

Kernel panic via DMA access after teardown

Published Sep 18, 2025 · Updated Sep 18, 2025

A DMA use-after-release in the Linux kernel fsl_lpuart driver allows local users to panic the kernel by terminating btattach. lpuart_dma_shutdown relinquishes the DMA channels but leaves the RX and TX use flags set, so lpuart_flush_buffer calls DMA APIs after teardown. Triggering the crash requires local access, an active FSL LPUART DMA-backed serial device, and termination of a process such as btattach.

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

What happened

A DMA use-after-release in the Linux kernel fsl_lpuart driver allows local users to panic the kernel by terminating btattach. lpuart_dma_shutdown relinquishes the DMA channels but leaves the RX and TX use flags set, so lpuart_flush_buffer calls DMA APIs after teardown. Triggering the crash requires local access, an active FSL LPUART DMA-backed serial device, and termination of a process such as btattach.

The record

CVE
CVE-2022-50375
Published
Sep 18, 2025
Updated
Sep 18, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 18, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 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=4.9
  2. Affected versionversion=6250cc30c4c4e25393ba247f71bdc04b6af3191b <29b897ac7b990882c74bd08605692214e7e58b83
  3. Affected versionversion=6250cc30c4c4e25393ba247f71bdc04b6af3191b <316ae95c175a7d770d1bfe4c011192712f57aa4a
  4. Affected versionversion=6250cc30c4c4e25393ba247f71bdc04b6af3191b <3953e7f261e2f4d9c35f0c025df9f166f46aa626
  5. Affected versionversion=6250cc30c4c4e25393ba247f71bdc04b6af3191b <9a56ade124d4891a31ab1300c57665f07f5b24d5
  6. Affected versionversion=6250cc30c4c4e25393ba247f71bdc04b6af3191b <c4293def8860fd587a84400ccba5b49cec56e2c3
  7. Affected versionversion=6250cc30c4c4e25393ba247f71bdc04b6af3191b <d554c14eb73ee91d76fc9aece4616f0b687c295d

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.9; version=6250cc30c4c4e25393ba247f71bdc04b6af3191b <29b897ac7b990882c74bd08605692214e7e58b83; version=6250cc30c4c4e25393ba247f71bdc04b6af3191b <316ae95c175a7d770d1bfe4c011192712f57aa4a; version=6250cc30c4c4e25393ba247f71bdc04b6af3191b <3953e7f261e2f4d9c35f0c025df9f166f46aa626; version=6250cc30c4c4e25393ba247f71bdc04b6af3191b <9a56ade124d4891a31ab1300c57665f07f5b24d5; version=6250cc30c4c4e25393ba247f71bdc04b6af3191b <c4293def8860fd587a84400ccba5b49cec56e2c3; version=6250cc30c4c4e25393ba247f71bdc04b6af3191b <d554c14eb73ee91d76fc9aece4616f0b687c295d

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.

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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

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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