CVE-2022-49225

Local service interruption via unreleased firmware buffer

Published Feb 26, 2025 · Updated May 11, 2026

Memory leakage in the mt7921s driver in Linux 5.17 through 5.17.1 allows local users to exhaust kernel memory during firmware loading. The mt7921_load_patch routine obtains a firmware buffer with request_firmware() but finishes without calling release_firmware(), leaving the buffer allocated. A low-privileged local user must trigger firmware loading on a system using the affected MediaTek wireless driver; accumulated leakage interrupts service through memory exhaustion.

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

Memory leakage in the mt7921s driver in Linux 5.17 through 5.17.1 allows local users to exhaust kernel memory during firmware loading. The mt7921_load_patch routine obtains a firmware buffer with request_firmware() but finishes without calling release_firmware(), leaving the buffer allocated. A low-privileged local user must trigger firmware loading on a system using the affected MediaTek wireless driver; accumulated leakage interrupts service through memory exhaustion.

The record

CVE
CVE-2022-49225
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 2025CVE 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=5.17
  2. Affected versionversion=78b217580c50994ae22dde4ecaaf147de0f355f6 <11005b18f453aa192d035d410c11d07edcba5a45
  3. Affected versionversion=78b217580c50994ae22dde4ecaaf147de0f355f6 <b301043384c5c2447357952be9a536c2026d8ad0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.17; version=78b217580c50994ae22dde4ecaaf147de0f355f6 <11005b18f453aa192d035d410c11d07edcba5a45; version=78b217580c50994ae22dde4ecaaf147de0f355f6 <b301043384c5c2447357952be9a536c2026d8ad0

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 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-401Missing Release of Memory after Effective Lifetime

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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