CVE-2022-49980Public exploit

Freed-memory read via unlocked driver dereference

Published Jun 18, 2025 · Updated May 11, 2026

Use-after-free in the Linux kernel USB gadget core allows local users to trigger an invalid read from freed kernel memory. The usb_udc_uevent() callback dereferences udc->driver without holding udc_lock while concurrent gadget-driver unregistration can free that structure. Reachability requires CAP_SYS_ADMIN or root in the initial user namespace, and the demonstrated consequence is a KASAN-detected kernel-memory read.

CVSS severity7.8
High
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

Use-after-free in the Linux kernel USB gadget core allows local users to trigger an invalid read from freed kernel memory. The usb_udc_uevent() callback dereferences udc->driver without holding udc_lock while concurrent gadget-driver unregistration can free that structure. Reachability requires CAP_SYS_ADMIN or root in the initial user namespace, and the demonstrated consequence is a KASAN-detected kernel-memory read.

The record

CVE
CVE-2022-49980
Published
Jun 18, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416
Attack vector
local
Privileges
admin

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=2ccea03a8f7ec93641791f2760d7cdc6cab6205f <2191c00855b03aa59c20e698be713d952d51fc18
  2. Affected versionversion=2ccea03a8f7ec93641791f2760d7cdc6cab6205f <f44b0b95d50fffeca036e1ba36770390e0b519dd
  3. Affected versionversion=3.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=2ccea03a8f7ec93641791f2760d7cdc6cab6205f <2191c00855b03aa59c20e698be713d952d51fc18; version=2ccea03a8f7ec93641791f2760d7cdc6cab6205f <f44b0b95d50fffeca036e1ba36770390e0b519dd; version=3.1

Published CVSS scores

7.0Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8UbuntuCVSS: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

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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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-416Use After Free

Public exploit references

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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