CVE-2022-49389

Local resource exhaustion via leaked USB references

Published Feb 26, 2025 · Updated May 23, 2026

A reference leak in the Linux kernel USB/IP stub driver allows local users to exhaust kernel resources through failed USB device probes. stub_device_alloc() acquires a USB device reference with usb_get_dev(), but the stub_probe() failure path reaches sdev_free without a matching usb_put_dev(). Exploitation requires local low-privileged access and repeated probe failures; the documented consequence is loss of availability, not data access or modification.

CVSS severity5.5
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A reference leak in the Linux kernel USB/IP stub driver allows local users to exhaust kernel resources through failed USB device probes. stub_device_alloc() acquires a USB device reference with usb_get_dev(), but the stub_probe() failure path reaches sdev_free without a matching usb_put_dev(). Exploitation requires local low-privileged access and repeated probe failures; the documented consequence is loss of availability, not data access or modification.

The record

CVE
CVE-2022-49389
Published
Feb 26, 2025
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 2025CVE 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.16.58 <3.17
  2. Affected versionversion=3.18.110 <3.19
  3. Affected versionversion=3.19
  4. Affected versionversion=3ff67445750a84de67faaf52c6e1895cb09f2c56 <11c65408bd0ba1d9cd1307caa38169292de9cdfb
  5. Affected versionversion=3ff67445750a84de67faaf52c6e1895cb09f2c56 <247d3809e45a34d9e1a3a2bb7012e31ed8b46031
  6. Affected versionversion=3ff67445750a84de67faaf52c6e1895cb09f2c56 <2f0ae93ec33c8456cdfbf7876b80403a6318ebce
  7. Affected versionversion=3ff67445750a84de67faaf52c6e1895cb09f2c56 <51422046be504515eb5a591adf0f424b62f46804
  8. Affected versionversion=3ff67445750a84de67faaf52c6e1895cb09f2c56 <6bafee2f18af5e5ac125e42960bc65496d0e56a0
  9. Affected versionversion=3ff67445750a84de67faaf52c6e1895cb09f2c56 <8afb048800919d0ab10c57983940eba956339f21
  10. Affected versionversion=3ff67445750a84de67faaf52c6e1895cb09f2c56 <9ec4cbf1cc55d126759051acfe328d489c5d6e60
  11. Affected versionversion=3ff67445750a84de67faaf52c6e1895cb09f2c56 <bcbb795a9e78180d74c6ab21518da87e803dfdce
  12. Affected versionversion=3ff67445750a84de67faaf52c6e1895cb09f2c56 <f20d2d3b3364ce6525c050a8b6b4c54c8c19674d
  13. Affected versionversion=77e7f91231bf63e3c64eb59a2aaf5754eaea2e69
  14. Affected versionversion=d0f35e23dafa0185f979d0c70463caa658062264

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.16.58 <3.17; version=3.18.110 <3.19; version=3.19; version=3ff67445750a84de67faaf52c6e1895cb09f2c56 <11c65408bd0ba1d9cd1307caa38169292de9cdfb; version=3ff67445750a84de67faaf52c6e1895cb09f2c56 <247d3809e45a34d9e1a3a2bb7012e31ed8b46031; version=3ff67445750a84de67faaf52c6e1895cb09f2c56 <2f0ae93ec33c8456cdfbf7876b80403a6318ebce; version=3ff67445750a84de67faaf52c6e1895cb09f2c56 <51422046be504515eb5a591adf0f424b62f46804; version=3ff67445750a84de67faaf52c6e1895cb09f2c56 <6bafee2f18af5e5ac125e42960bc65496d0e56a0; version=3ff67445750a84de67faaf52c6e1895cb09f2c56 <8afb048800919d0ab10c57983940eba956339f21; version=3ff67445750a84de67faaf52c6e1895cb09f2c56 <9ec4cbf1cc55d126759051acfe328d489c5d6e60; version=3ff67445750a84de67faaf52c6e1895cb09f2c56 <bcbb795a9e78180d74c6ab21518da87e803dfdce; version=3ff67445750a84de67faaf52c6e1895cb09f2c56 <f20d2d3b3364ce6525c050a8b6b4c54c8c19674d; version=77e7f91231bf63e3c64eb59a2aaf5754eaea2e69; version=d0f35e23dafa0185f979d0c70463caa658062264

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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