CVE-2022-49686

Kernel panic via duplicate UVC request enqueue

Published Feb 26, 2025 · Updated May 11, 2026

Double free in affected Linux kernel revisions allows local users to trigger a kernel panic through the USB gadget UVC endpoint. In uvcg_video_pump, an endpoint-disable race leaves a queued request handle valid, so the pump places the request on req_free before the completion callback places it there again. Local access capable of configuring and exercising the USB gadget UVC function is required; the demonstrated consequence is a kernel BUG and system crash.

CVSS severity7.8
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Double free in affected Linux kernel revisions allows local users to trigger a kernel panic through the USB gadget UVC endpoint. In uvcg_video_pump, an endpoint-disable race leaves a queued request handle valid, so the pump places the request on req_free before the completion callback places it there again. Local access capable of configuring and exercising the USB gadget UVC function is required; the demonstrated consequence is a kernel BUG and system crash.

The record

CVE
CVE-2022-49686
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-415, T1499
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=5.16
  2. Affected versionversion=f9897ec0f6d34e8b2bc2f4c8ab8789351090f3d2 <96163f835e65f8c9897487fac965819f0651d671
  3. Affected versionversion=f9897ec0f6d34e8b2bc2f4c8ab8789351090f3d2 <d95ac8b920de1d39525fadc408ce675697626ca6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.16; version=f9897ec0f6d34e8b2bc2f4c8ab8789351090f3d2 <96163f835e65f8c9897487fac965819f0651d671; version=f9897ec0f6d34e8b2bc2f4c8ab8789351090f3d2 <d95ac8b920de1d39525fadc408ce675697626ca6

Published CVSS scores

7.8NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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

CWE-415Double Free
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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