CVE-2022-50005

Kernel memory corruption via uncleared timeout timer

Published Jun 18, 2025 · Updated May 11, 2026

Use-after-free in the Linux kernel PN532 UART driver allows local users to trigger invalid kernel memory access during device detachment. The pn532_uart_remove() path frees the pn532 object without synchronously deleting cmd_timeout, allowing pn532_cmd_timeout() to call pn532_uart_send_frame() through freed state. The race requires a PN532 UART device and concurrent teardown with a pending command timer; the public record does not document a demonstrated exploit consequence.

CVSS severity7.8
High
EPSS probability0.23%
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 PN532 UART driver allows local users to trigger invalid kernel memory access during device detachment. The pn532_uart_remove() path frees the pn532 object without synchronously deleting cmd_timeout, allowing pn532_cmd_timeout() to call pn532_uart_send_frame() through freed state. The race requires a PN532 UART device and concurrent teardown with a pending command timer; the public record does not document a demonstrated exploit consequence.

The record

CVE
CVE-2022-50005
Published
Jun 18, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
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=5.5
  2. Affected versionversion=c656aa4c27b17a8c70da223ed5ab42145800d6b5 <2c71f5d55a86fd5969428abf525c1ae6b1c7b0f5
  3. Affected versionversion=c656aa4c27b17a8c70da223ed5ab42145800d6b5 <50403ee6daddf0d7a14e9d3b51a377c39a08ec8c
  4. Affected versionversion=c656aa4c27b17a8c70da223ed5ab42145800d6b5 <9c34c33893db7a80d0e4b55c23d3b65e29609cfb
  5. Affected versionversion=c656aa4c27b17a8c70da223ed5ab42145800d6b5 <f1e941dbf80a9b8bab0bffbc4cbe41cc7f4c6fb6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.5; version=c656aa4c27b17a8c70da223ed5ab42145800d6b5 <2c71f5d55a86fd5969428abf525c1ae6b1c7b0f5; version=c656aa4c27b17a8c70da223ed5ab42145800d6b5 <50403ee6daddf0d7a14e9d3b51a377c39a08ec8c; version=c656aa4c27b17a8c70da223ed5ab42145800d6b5 <9c34c33893db7a80d0e4b55c23d3b65e29609cfb; version=c656aa4c27b17a8c70da223ed5ab42145800d6b5 <f1e941dbf80a9b8bab0bffbc4cbe41cc7f4c6fb6

Published CVSS scores

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

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

No sourced classifications are available.

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

See the directory against your own environment.

Your stack

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