CVE-2022-49943

Service interruption via USB gadget lock inversion

Published Jun 18, 2025 · Updated May 11, 2026

Lock inversion in the USB gadget core of Linux 5.19.7 allows local users to interrupt service through USB gadget operations. drivers/usb/gadget/udc/core.c holds udc_mutex while bind, unbind, start, or stop callbacks acquire dependent locks, creating a circular lock order; function_show also dereferences udc->driver without the mutex. Low-privileged local access and an active USB gadget controller are required; confidentiality and integrity are unaffected.

CVSS severity5.5
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Lock inversion in the USB gadget core of Linux 5.19.7 allows local users to interrupt service through USB gadget operations. drivers/usb/gadget/udc/core.c holds udc_mutex while bind, unbind, start, or stop callbacks acquire dependent locks, creating a circular lock order; function_show also dereferences udc->driver without the mutex. Low-privileged local access and an active USB gadget controller are required; confidentiality and integrity are unaffected.

The record

CVE
CVE-2022-49943
Published
Jun 18, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 18, 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=2191c00855b03aa59c20e698be713d952d51fc18 <1016fc0c096c92dd0e6e0541daac7a7868169903
  2. Affected versionversion=5.19.7 <5.19.8
  3. Affected versionversion=f44b0b95d50fffeca036e1ba36770390e0b519dd <1a065e4673cbdd9f222a05f85e17d78ea50c8d9c

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2191c00855b03aa59c20e698be713d952d51fc18 <1016fc0c096c92dd0e6e0541daac7a7868169903; version=5.19.7 <5.19.8; version=f44b0b95d50fffeca036e1ba36770390e0b519dd <1a065e4673cbdd9f222a05f85e17d78ea50c8d9c

Published CVSS scores

5.5UbuntuCVSS: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

T1499Endpoint Denial of Service

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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