CVE-2022-49539

System hang via rtw89 CAM resource leaks

Published Feb 26, 2025 · Updated May 11, 2026

Resource leak in the Linux kernel rtw89 driver 5.16 through 5.18.2 allows local users to hang the system through repeated L2 resets. During restart, rtw89 releases CAM entries only for secured connections and reacquires already-valid entries, exhausting address and BSSID CAM slots. Realtek 8852AE hardware with the rtw89 driver and a locally triggered recovery reset is required; the bounded consequence is loss of system availability.

CVSS severity5.5
Medium
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

Resource leak in the Linux kernel rtw89 driver 5.16 through 5.18.2 allows local users to hang the system through repeated L2 resets. During restart, rtw89 releases CAM entries only for secured connections and reacquires already-valid entries, exhausting address and BSSID CAM slots. Realtek 8852AE hardware with the rtw89 driver and a locally triggered recovery reset is required; the bounded consequence is loss of system availability.

The record

CVE
CVE-2022-49539
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401, T1499.004
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=e3ec7017f6a20d12ddd9fe23d345ebb7b8c104dd <b169f877f001a474fb89939842c390518160bcc5
  3. Affected versionversion=e3ec7017f6a20d12ddd9fe23d345ebb7b8c104dd <f6aff772c9978844529618d86aafb53e5d3ae161

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.16; version=e3ec7017f6a20d12ddd9fe23d345ebb7b8c104dd <b169f877f001a474fb89939842c390518160bcc5; version=e3ec7017f6a20d12ddd9fe23d345ebb7b8c104dd <f6aff772c9978844529618d86aafb53e5d3ae161

Published CVSS scores

5.5NVDCVSS: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.

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

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

CWE-401Missing Release of Memory after Effective Lifetime
T1499.004Application or System Exploitation

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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