CVE-2022-50565

Availability loss via leaked URB array

Published Oct 22, 2025 · Updated Oct 22, 2025

Memory leak in the Linux kernel PureLiFi USB Wi-Fi driver allows local users to consume kernel memory through failed receive setup. In __lf_x_usb_enable_rx(), exception paths free receive URBs but omit kfree() for the allocated urbs pointer array. Reachability requires an affected kernel with plfxlc support and a PureLiFi USB adapter, and the disclosed consequence is availability loss without data disclosure.

CVSS severity4.7
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leak in the Linux kernel PureLiFi USB Wi-Fi driver allows local users to consume kernel memory through failed receive setup. In __lf_x_usb_enable_rx(), exception paths free receive URBs but omit kfree() for the allocated urbs pointer array. Reachability requires an affected kernel with plfxlc support and a PureLiFi USB adapter, and the disclosed consequence is availability loss without data disclosure.

The record

CVE
CVE-2022-50565
Published
Oct 22, 2025
Updated
Oct 22, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 22, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 22, 2025Record 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=5.19
  2. Affected versionversion=68d57a07bfe5bb29b80cd8b8fa24c9d1ea104124 <286464463a05cb4bad80b134e24f8ffaab20bee4
  3. Affected versionversion=68d57a07bfe5bb29b80cd8b8fa24c9d1ea104124 <895b3b06efc285c1245242e9638b9ae251dc13ec
  4. Affected versionversion=68d57a07bfe5bb29b80cd8b8fa24c9d1ea104124 <fce7e46273649d9cdcd98d89551975a65f206a14

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.19; version=68d57a07bfe5bb29b80cd8b8fa24c9d1ea104124 <286464463a05cb4bad80b134e24f8ffaab20bee4; version=68d57a07bfe5bb29b80cd8b8fa24c9d1ea104124 <895b3b06efc285c1245242e9638b9ae251dc13ec; version=68d57a07bfe5bb29b80cd8b8fa24c9d1ea104124 <fce7e46273649d9cdcd98d89551975a65f206a14

Published CVSS scores

5.7SUSECVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
4.7SUSECVSS:3.1/AV:L/AC:H/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

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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