CVE-2025-21730

Local denial of service via double list insertion

Published Feb 27, 2025 · Updated Aug 5, 2026

Denial of service in the Linux kernel 6.13 rtw89 driver allows local users to crash the host during a failed WoWLAN resume. When rtw89_ops_add_interface() runs again without prior interface removal, it reinitializes a still-linked mgnt_entry and list_add_tail() inserts it twice, defeating the list-empty guard. Local access, affected rtw89 hardware, and a WoWLAN-disable failure are required; the resulting list corruption reaches a kernel BUG and interrupts the host.

CVSS severity7.8
High
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in the Linux kernel 6.13 rtw89 driver allows local users to crash the host during a failed WoWLAN resume. When rtw89_ops_add_interface() runs again without prior interface removal, it reinitializes a still-linked mgnt_entry and list_add_tail() inserts it twice, defeating the list-empty guard. Local access, affected rtw89 hardware, and a WoWLAN-disable failure are required; the resulting list corruption reaches a kernel BUG and interrupts the host.

The record

CVE
CVE-2025-21730
Published
Feb 27, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 27, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=0007546cb406be0dddf3d43f07683825affc6d4d <7fc295fdd3992a9a07d12fd3f2e84dface23aedc
  2. Affected versionversion=6.13
  3. Affected versionversion=68ec751b288178de7d19b71ea61648269a35b8cd <2f7667675df1b40b73ecc53b4b8c3189b1e5f2c1
  4. Affected versionversion=68ec751b288178de7d19b71ea61648269a35b8cd <4ed5bf49819757303e657f3900725febf2f3926f

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=0007546cb406be0dddf3d43f07683825affc6d4d <7fc295fdd3992a9a07d12fd3f2e84dface23aedc; version=6.13; version=68ec751b288178de7d19b71ea61648269a35b8cd <2f7667675df1b40b73ecc53b4b8c3189b1e5f2c1; version=68ec751b288178de7d19b71ea61648269a35b8cd <4ed5bf49819757303e657f3900725febf2f3926f

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.8LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

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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