CVE-2022-49309

System hang via rtl8723bs scan-timer deadlock

Published Feb 26, 2025 · Updated Aug 12, 2026

A deadlock in the Linux kernel rtl8723bs Wi-Fi driver allows local users to hang affected systems during scan completion. The rtw_surveydone_event_callback holds pmlmepriv->lock while del_timer_sync() waits for rtw_scan_timeout_handler(), which attempts to acquire the same lock. Reachability requires an affected kernel with the rtl8723bs driver and compatible Wi-Fi hardware; the documented consequence is an indefinite hang, not data access or modification.

CVSS severity5.5
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A deadlock in the Linux kernel rtl8723bs Wi-Fi driver allows local users to hang affected systems during scan completion. The rtw_surveydone_event_callback holds pmlmepriv->lock while del_timer_sync() waits for rtw_scan_timeout_handler(), which attempts to acquire the same lock. Reachability requires an affected kernel with the rtl8723bs driver and compatible Wi-Fi hardware; the documented consequence is an indefinite hang, not data access or modification.

The record

CVE
CVE-2022-49309
Published
Feb 26, 2025
Updated
Aug 12, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 12, 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=5.10
  2. Affected versionversion=fb127a61c9d8dfd9b370ee173344d01711f3c698 <2c41f5c341853f84b7bc2f32605d4e2782e8c279
  3. Affected versionversion=fb127a61c9d8dfd9b370ee173344d01711f3c698 <c84e5c819600ee0628f61b33d145258ae0f3d7a7
  4. Affected versionversion=fb127a61c9d8dfd9b370ee173344d01711f3c698 <cc7ad0d77b51c872d629bcd98aea463a3c4109e7
  5. Affected versionversion=fb127a61c9d8dfd9b370ee173344d01711f3c698 <ce129d3efd181da5fd56f4360cc8827122afa67e
  6. Affected versionversion=fb127a61c9d8dfd9b370ee173344d01711f3c698 <f89f6c3ebf69623b8ea48200bd690e9e210335a1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.10; version=fb127a61c9d8dfd9b370ee173344d01711f3c698 <2c41f5c341853f84b7bc2f32605d4e2782e8c279; version=fb127a61c9d8dfd9b370ee173344d01711f3c698 <c84e5c819600ee0628f61b33d145258ae0f3d7a7; version=fb127a61c9d8dfd9b370ee173344d01711f3c698 <cc7ad0d77b51c872d629bcd98aea463a3c4109e7; version=fb127a61c9d8dfd9b370ee173344d01711f3c698 <ce129d3efd181da5fd56f4360cc8827122afa67e; version=fb127a61c9d8dfd9b370ee173344d01711f3c698 <f89f6c3ebf69623b8ea48200bd690e9e210335a1

Published CVSS scores

5.5NIST NVDCVSS: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.

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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.

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Technologies

Your stack

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Your stack

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