CVE-2022-48705

Local system crash via repeated failed chip reset

Published May 3, 2024 · Updated May 23, 2026

Denial of service in the mt7921e driver in Linux 5.16.3 through 5.19.8 allows local users to crash the system during chip reset. When driver ownership fails during repeated mt7921e_mac_reset runs, the reset path disables tx_napi again without first re-enabling or scheduling it, leaving napi_disable() waiting indefinitely. A local user with low privileges must reach the MediaTek MT7921 PCIe reset path; successful triggering interrupts the host rather than exposing or modifying data.

CVSS severity5.5
Medium
EPSS probability0.19%
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 mt7921e driver in Linux 5.16.3 through 5.19.8 allows local users to crash the system during chip reset. When driver ownership fails during repeated mt7921e_mac_reset runs, the reset path disables tx_napi again without first re-enabling or scheduling it, leaving napi_disable() waiting indefinitely. A local user with low privileges must reach the MediaTek MT7921 PCIe reset path; successful triggering interrupts the host rather than exposing or modifying data.

The record

CVE
CVE-2022-48705
Published
May 3, 2024
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 3, 2024CVE publishedPublication date reported by the CVE source.
  2. May 23, 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=0efaf31dec572d3aac4316c6d952e06d1c33adc4 <f7f3001723e337568017e8617974f29bc8b2f595
  2. Affected versionversion=0efaf31dec572d3aac4316c6d952e06d1c33adc4 <fa3fbe64037839f448dc569212bafc5a495d8219
  3. Affected versionversion=5.16.3 <5.17
  4. Affected versionversion=5.17
  5. Affected versionversion=cdb39e251f864910b2fb6c099b1ef9d12c6e22c7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=0efaf31dec572d3aac4316c6d952e06d1c33adc4 <f7f3001723e337568017e8617974f29bc8b2f595; version=0efaf31dec572d3aac4316c6d952e06d1c33adc4 <fa3fbe64037839f448dc569212bafc5a495d8219; version=5.16.3 <5.17; version=5.17; version=cdb39e251f864910b2fb6c099b1ef9d12c6e22c7

Published CVSS scores

5.5NVDCVSS: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

T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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