CVE-2022-49301

Local denial of service via uninitialized USB reads

Published Feb 26, 2025 · Updated May 11, 2026

Use of uninitialized data in the rtl8712 USB driver in Linux allows local users to cause a service interruption during device probing. The usb_read8, usb_read16, and usb_read32 helpers return an uninitialized stack value when r8712_usbctrl_vendorreq reports a failed control transfer. Reachability requires local low-privileged access and an rtl8712 USB device whose vendor request fails; the published impact is limited to availability.

CVSS severity5.5
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use of uninitialized data in the rtl8712 USB driver in Linux allows local users to cause a service interruption during device probing. The usb_read8, usb_read16, and usb_read32 helpers return an uninitialized stack value when r8712_usbctrl_vendorreq reports a failed control transfer. Reachability requires local low-privileged access and an rtl8712 USB device whose vendor request fails; the published impact is limited to availability.

The record

CVE
CVE-2022-49301
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-908
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=2.6.37
  2. Affected versionversion=2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef <33ef21d55418ab6a62a63fd550b2dbe297433372
  3. Affected versionversion=2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef <58762f1c63c75cbe1dc393eed3c9cf8e38310ca1
  4. Affected versionversion=2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef <95b0f54f8a898072a2810c05fab34d971f23a612
  5. Affected versionversion=2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef <d1b57669732d09da7e13ef86d058dab0cd57f6e0
  6. Affected versionversion=2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef <d7ed3c85da0b230bcdf5329acfe012ed093f3daa
  7. Affected versionversion=2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef <de075af8c404f7d59ed34df230aedd9f645fb846

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.37; version=2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef <33ef21d55418ab6a62a63fd550b2dbe297433372; version=2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef <58762f1c63c75cbe1dc393eed3c9cf8e38310ca1; version=2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef <95b0f54f8a898072a2810c05fab34d971f23a612; version=2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef <d1b57669732d09da7e13ef86d058dab0cd57f6e0; version=2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef <d7ed3c85da0b230bcdf5329acfe012ed093f3daa; version=2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef <de075af8c404f7d59ed34df230aedd9f645fb846

Published CVSS scores

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-908Use of Uninitialized Resource

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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