CVE-2022-49305 - Vulnerability Details

- drivers: staging: rtl8192u: Fix deadlock in ieee80211_beacons_stop()

Description

In the Linux kernel, the following vulnerability has been resolved:

drivers: staging: rtl8192u: Fix deadlock in ieee80211_beacons_stop()

There is a deadlock in ieee80211_beacons_stop(), which is shown below:

(Thread 1) | (Thread 2)
| ieee80211_send_beacon()
ieee80211_beacons_stop() | mod_timer()
spin_lock_irqsave() //(1) | (wait a time)
... | ieee80211_send_beacon_cb()
del_timer_sync() | spin_lock_irqsave() //(2)
(wait timer to stop) | ...

We hold ieee->beacon_lock in position (1) of thread 1 and use
del_timer_sync() to wait timer to stop, but timer handler
also need ieee->beacon_lock in position (2) of thread 2.
As a result, ieee80211_beacons_stop() will block forever.

This patch extracts del_timer_sync() from the protection of
spin_lock_irqsave(), which could let timer handler to obtain
the needed lock.

Published: 2025-02-26

Score: 5.5 Medium

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Linux

unaffected

Version	Status	Constraints
`8fc8598e61f6f384f3eaf1d9b09500c12af47b37`	affected	< b465bb2ebf666116c1ac745cb80c65154dc0d27e
`8fc8598e61f6f384f3eaf1d9b09500c12af47b37`	affected	< 1fbe033c52480f7954c057510040fa6286c4ea25
`8fc8598e61f6f384f3eaf1d9b09500c12af47b37`	affected	< 66f769762f65d957f688f3258755c6ec410bf710
`8fc8598e61f6f384f3eaf1d9b09500c12af47b37`	affected	< 042915c1bfedd684c1d98a841794ee203200571a
`8fc8598e61f6f384f3eaf1d9b09500c12af47b37`	affected	< ffc9cab7243f8151be37966301307bfd3cda2db3
`8fc8598e61f6f384f3eaf1d9b09500c12af47b37`	affected	< b34cb54923a6e5ddefbaf358c85c922c6ab456e2
`8fc8598e61f6f384f3eaf1d9b09500c12af47b37`	affected	< 806c7b53414934ba2a39449b31fd1a038e500273

Linux

affected

Version	Status	Constraints
`2.6.33`	affected	—
`0`	unaffected	< 2.6.33
`4.19.247`	unaffected	≤ 4.19.*
`5.4.198`	unaffected	≤ 5.4.*
`5.10.122`	unaffected	≤ 5.10.*
`5.15.47`	unaffected	≤ 5.15.*
`5.17.15`	unaffected	≤ 5.17.*
`5.18.4`	unaffected	≤ 5.18.*
`5.19`	unaffected	≤ *

Configuration 1 [-]

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

No data.

No data available yet.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

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Advisories

Source	ID	Title
EUVD	EUVD-2022-54922	In the Linux kernel, the following vulnerability has been resolved: drivers: staging: rtl8192u: Fix deadlock in ieee80211_beacons_stop() There is a deadlock in ieee80211_beacons_stop(), which is shown below: (Thread 1) \| (Thread 2) \| ieee80211_send_beacon() ieee80211_beacons_stop() \| mod_timer() spin_lock_irqsave() //(1) \| (wait a time) ... \| ieee80211_send_beacon_cb() del_timer_sync() \| spin_lock_irqsave() //(2) (wait timer to stop) \| ... We hold ieee->beacon_lock in position (1) of thread 1 and use del_timer_sync() to wait timer to stop, but timer handler also need ieee->beacon_lock in position (2) of thread 2. As a result, ieee80211_beacons_stop() will block forever. This patch extracts del_timer_sync() from the protection of spin_lock_irqsave(), which could let timer handler to obtain the needed lock.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00034.

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://git.kernel.org/stable/c/042915c1bfedd684c1d98a841794ee203200571a
https://git.kernel.org/stable/c/1fbe033c52480f7954c057510040fa6286c4ea25
https://git.kernel.org/stable/c/66f769762f65d957f688f3258755c6ec410bf710
https://git.kernel.org/stable/c/806c7b53414934ba2a39449b31fd1a038e500273
https://git.kernel.org/stable/c/b34cb54923a6e5ddefbaf358c85c922c6ab456e2
https://git.kernel.org/stable/c/b465bb2ebf666116c1ac745cb80c65154dc0d27e
https://git.kernel.org/stable/c/ffc9cab7243f8151be37966301307bfd3cda2db3
https://lore.kernel.org/linux-cve-announce/2025022635-CVE-2022-49305-9a46@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2022-49305
https://www.cve.org/CVERecord?id=CVE-2022-49305

History

Wed, 01 Oct 2025 20:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Mon, 14 Apr 2025 20:30:00 +0000

Type	Values Removed	Values Added
First Time appeared		Linux Linux linux Kernel
Weaknesses		CWE-667
CPEs		cpe:2.3:o:linux:linux_kernel::::::::
Vendors & Products		Linux Linux linux Kernel

Thu, 27 Feb 2025 01:45:00 +0000

Type	Values Removed	Values Added
References		https://lore.kernel.org/linux-cve-announce/2025022635-CVE-2022-49305-9a46@gregkh/T https://nvd.nist.gov/vuln/detail/CVE-2022-49305 https://www.cve.org/CVERecord?id=CVE-2022-49305
Metrics	threat_severity `None`	cvssV3_1 `{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}` threat_severity `Moderate`

Wed, 26 Feb 2025 02:45:00 +0000

Type	Values Removed	Values Added
Description		In the Linux kernel, the following vulnerability has been resolved: drivers: staging: rtl8192u: Fix deadlock in ieee80211_beacons_stop() There is a deadlock in ieee80211_beacons_stop(), which is shown below: (Thread 1) \| (Thread 2) \| ieee80211_send_beacon() ieee80211_beacons_stop() \| mod_timer() spin_lock_irqsave() //(1) \| (wait a time) ... \| ieee80211_send_beacon_cb() del_timer_sync() \| spin_lock_irqsave() //(2) (wait timer to stop) \| ... We hold ieee->beacon_lock in position (1) of thread 1 and use del_timer_sync() to wait timer to stop, but timer handler also need ieee->beacon_lock in position (2) of thread 2. As a result, ieee80211_beacons_stop() will block forever. This patch extracts del_timer_sync() from the protection of spin_lock_irqsave(), which could let timer handler to obtain the needed lock.
Title		drivers: staging: rtl8192u: Fix deadlock in ieee80211_beacons_stop()
References		https://git.kernel.org/stable/c/042915c1bfedd684c1d98a841794ee203200571a https://git.kernel.org/stable/c/1fbe033c52480f7954c057510040fa6286c4ea25 https://git.kernel.org/stable/c/66f769762f65d957f688f3258755c6ec410bf710 https://git.kernel.org/stable/c/806c7b53414934ba2a39449b31fd1a038e500273 https://git.kernel.org/stable/c/b34cb54923a6e5ddefbaf358c85c922c6ab456e2 https://git.kernel.org/stable/c/b465bb2ebf666116c1ac745cb80c65154dc0d27e https://git.kernel.org/stable/c/ffc9cab7243f8151be37966301307bfd3cda2db3

Subscriptions

Linux Linux Kernel

MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2025-02-26T02:10:38.212Z

Updated: 2026-05-11T18:57:07.127Z

Reserved: 2025-02-26T02:08:31.535Z

Link: CVE-2022-49305

Vulnrichment

Updated: 2025-10-01T16:13:53.353Z

NVD

Status : Modified

Published: 2025-02-26T07:01:07.310

Modified: 2025-10-01T20:16:03.950

Link: CVE-2022-49305

Redhat

Severity : Moderate

Publid Date: 2025-02-26T00:00:00Z

Links: CVE-2022-49305 - Bugzilla

OpenCVE Enrichment

No data.

Weaknesses

CWE-667

Tracking

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

Exploitation none

Automatable no

Technical Impact partial

Subscriptions

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