CVE-2023-53565

Wi-Fi interruption via NULL probe identifier dereference

Published Oct 4, 2025 · Updated Oct 4, 2025

NULL pointer dereference in the Linux kernel 6.2 through 6.3.3 allows local users to interrupt Wi-Fi service during device resume. The brcmf_pcie_probe function dereferences a NULL device identifier when D3 resume reprobes PCI hardware; manual sysfs binding can also pass NULL to PCI, USB, or SDIO probe paths. Reachability requires affected brcmfmac hardware and either D3 resume or manual driver binding, and the resulting kernel oops stops Wi-Fi.

CVSS severity5.5
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in the Linux kernel 6.2 through 6.3.3 allows local users to interrupt Wi-Fi service during device resume. The brcmf_pcie_probe function dereferences a NULL device identifier when D3 resume reprobes PCI hardware; manual sysfs binding can also pass NULL to PCI, USB, or SDIO probe paths. Reachability requires affected brcmfmac hardware and either D3 resume or manual driver binding, and the resulting kernel oops stops Wi-Fi.

The record

CVE
CVE-2023-53565
Published
Oct 4, 2025
Updated
Oct 4, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 4, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 4, 2025Record 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=6.2
  2. Affected versionversion=da6d9c8ecd00e20218461007948f2b0a8e7fa242 <60fc756fc8e6954a5618eecac73b255d651602e4
  3. Affected versionversion=da6d9c8ecd00e20218461007948f2b0a8e7fa242 <84766e77a5c35e2b60e34f570c62fc97adc05e09

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.2; version=da6d9c8ecd00e20218461007948f2b0a8e7fa242 <60fc756fc8e6954a5618eecac73b255d651602e4; version=da6d9c8ecd00e20218461007948f2b0a8e7fa242 <84766e77a5c35e2b60e34f570c62fc97adc05e09

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.

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

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

CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

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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