CVE-2026-99061Public exploit

Kernel crash via racing P2P interface removal

Published Oct 23, 2026 · Updated Oct 23, 2026

Linux brcmfmac has a teardown race that allows local users to crash the kernel by removing the driver during P2P deletion. In brcmf_detach(), missing synchronization with brcmf_p2p_del_vif() causes an already-freed wireless device to be unregistered again. Reproduction requires an active P2P device and driver removal overlapping wpa_supplicant exit; the documented trigger uses module-unload privileges.

CVSS severityUnavailable
Unscored
EPSS probability0.18%
Next 30 days · Nov 1, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Linux brcmfmac has a teardown race that allows local users to crash the kernel by removing the driver during P2P deletion. In brcmf_detach(), missing synchronization with brcmf_p2p_del_vif() causes an already-freed wireless device to be unregistered again. Reproduction requires an active P2P device and driver removal overlapping wpa_supplicant exit; the documented trigger uses module-unload privileges.

The record

CVE
CVE-2026-99061
Published
Oct 23, 2026
Updated
Oct 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Oct 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 23, 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=4.4
  2. Affected versionversion=9831bcb987df4aff6a1d85975f1dda4c654f298d <08a3f02fea636e97a7422d1512f76dacdb5b0887
  3. Affected versionversion=9831bcb987df4aff6a1d85975f1dda4c654f298d <2e0c8c60a11b3177e7432c71d41249e276a0825f
  4. Affected versionversion=9831bcb987df4aff6a1d85975f1dda4c654f298d <47ca6395a1d91545cc9403f9218bc61be941a0c3
  5. Affected versionversion=9831bcb987df4aff6a1d85975f1dda4c654f298d <7b79131e357c4786765b20a994ad40d4d35f2163
  6. Affected versionversion=9831bcb987df4aff6a1d85975f1dda4c654f298d <eef16a74ff8ed2a838d6bb862bb2c7783fce7466

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=4.4; version=9831bcb987df4aff6a1d85975f1dda4c654f298d <08a3f02fea636e97a7422d1512f76dacdb5b0887; version=9831bcb987df4aff6a1d85975f1dda4c654f298d <2e0c8c60a11b3177e7432c71d41249e276a0825f; version=9831bcb987df4aff6a1d85975f1dda4c654f298d <47ca6395a1d91545cc9403f9218bc61be941a0c3; version=9831bcb987df4aff6a1d85975f1dda4c654f298d <7b79131e357c4786765b20a994ad40d4d35f2163; version=9831bcb987df4aff6a1d85975f1dda4c654f298d <eef16a74ff8ed2a838d6bb862bb2c7783fce7466

Published CVSS scores

No CVSS assessment is available in this record.

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

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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