Linux Kernel up to 6.18.51/7.2.5 cfg80211 cfg80211_stop_p2p_device locking

CVSS Meta Temp Score
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CTI Interest Score
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7.4$0-$5k0.80+

Summaryinfo

A vulnerability has been found in Linux Kernel up to 6.18.51/7.2.5 and classified as critical. The affected element is the function cfg80211_stop_p2p_device of the component cfg80211. This manipulation causes locking. This vulnerability is registered as CVE-2026-90343. The attack needs to be launched locally. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 6.18.51/7.2.5 and classified as critical. Affected by this vulnerability is the function cfg80211_stop_p2p_device of the component cfg80211. The manipulation with an unknown input leads to a locking vulnerability. The CWE definition for the vulnerability is CWE-667. The product does not properly acquire or release a lock on a resource, leading to unexpected resource state changes and behaviors. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: stop PMSR before P2P and NAN teardown PMSR request teardown must abort active measurements while the wireless_dev is still present in the driver. cfg80211_leave_locked() and cfg80211_stop_pd() already do this before invoking the driver's stop callback, but cfg80211_stop_p2p_device() and cfg80211_stop_nan() do not. Those helpers are also called directly by nl80211, rfkill shutdown, and wireless_dev unregister paths. If one of these paths stops a P2P device or NAN interface with a pending request, it removes the mac80211 subinterface from the driver first. Subsequent request cleanup cannot reach the lower driver's abort callback, but cfg80211 frees the request regardless. Driver state can then retain a stale request and use it when it later reports a result. Call cfg80211_pmsr_wdev_down() before stopping the P2P device or NAN interface. This keeps lower-driver request state and cfg80211 request ownership in sync for all of the helpers' callers.

The advisory is shared at git.kernel.org. This vulnerability is known as CVE-2026-90343 since 09/11/2026. The exploitation appears to be easy. An attack has to be approached locally. The exploitation requires an enhanced level of successful authentication. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/17/2026).

Upgrading to version 6.18.52, 7.2.6 or 7.3-rc1 eliminates this vulnerability. Applying the patch 7a22cbc6c6bdd3c3811b4ce13875685c520f94de/db3439ad11ac5e52decdefe784c98b21c3757848/6c5fc504d0d6934132637aa3db4b9b58148eaa78 is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.7
VulDB Meta Temp Score: 7.4

VulDB Base Score: 7.7
VulDB Temp Score: 7.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Locking
CWE: CWE-667
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.18.52/7.2.6/7.3-rc1
Patch: 7a22cbc6c6bdd3c3811b4ce13875685c520f94de/db3439ad11ac5e52decdefe784c98b21c3757848/6c5fc504d0d6934132637aa3db4b9b58148eaa78

Timelineinfo

09/11/2026 CVE reserved
09/17/2026 +6 days Advisory disclosed
09/17/2026 +0 days VulDB entry created
09/17/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-90343 (🔒)
GCVE (CVE): GCVE-0-2026-90343
GCVE (VulDB): GCVE-100-406885

Entryinfo

Created: 09/17/2026 21:45
Changes: 09/17/2026 21:45 (59)
Complete: 🔍
Cache ID: 216::103

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