CVE-2023-53589

Kernel crash via unchecked firmware channel count

Published Oct 4, 2025 · Updated Oct 4, 2025

Out-of-bounds copying in Linux kernel iwlwifi allows local users to crash the kernel via a corrupted firmware MCC response. The MCC update handler trusts n_channels when sizing and copying the response, so an inflated value copies uninitialized data beyond the one-page firmware buffer. Exposure requires an affected kernel using the iwlwifi MVM driver with Intel wireless hardware and a malformed MCC response; the documented consequence is a kernel crash.

CVSS severity5.5
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds copying in Linux kernel iwlwifi allows local users to crash the kernel via a corrupted firmware MCC response. The MCC update handler trusts n_channels when sizing and copying the response, so an inflated value copies uninitialized data beyond the one-page firmware buffer. Exposure requires an affected kernel using the iwlwifi MVM driver with Intel wireless hardware and a malformed MCC response; the documented consequence is a kernel crash.

The record

CVE
CVE-2023-53589
Published
Oct 4, 2025
Updated
Oct 4, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.1
  2. Affected versionversion=dcaf9f5ecb6f395152609bdc40660d9b593dca63 <05ad5a4d421ce65652fcb24d46b7e273130240d6
  3. Affected versionversion=dcaf9f5ecb6f395152609bdc40660d9b593dca63 <557ba100d8cf3661ff8d71c0b4a2cba8db555ec2
  4. Affected versionversion=dcaf9f5ecb6f395152609bdc40660d9b593dca63 <682b6dc29d98e857e6ca4bbc077c7dc2899b7473
  5. Affected versionversion=dcaf9f5ecb6f395152609bdc40660d9b593dca63 <c176f03350954b795322de0bfe1d7b514db41f45
  6. Affected versionversion=dcaf9f5ecb6f395152609bdc40660d9b593dca63 <d0d39bed9e95f27a246be91c5929254ac043ed30
  7. Affected versionversion=dcaf9f5ecb6f395152609bdc40660d9b593dca63 <e519a404a5bbba37693cb10fa61794a5fce4fd9b

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.1; version=dcaf9f5ecb6f395152609bdc40660d9b593dca63 <05ad5a4d421ce65652fcb24d46b7e273130240d6; version=dcaf9f5ecb6f395152609bdc40660d9b593dca63 <557ba100d8cf3661ff8d71c0b4a2cba8db555ec2; version=dcaf9f5ecb6f395152609bdc40660d9b593dca63 <682b6dc29d98e857e6ca4bbc077c7dc2899b7473; version=dcaf9f5ecb6f395152609bdc40660d9b593dca63 <c176f03350954b795322de0bfe1d7b514db41f45; version=dcaf9f5ecb6f395152609bdc40660d9b593dca63 <d0d39bed9e95f27a246be91c5929254ac043ed30; version=dcaf9f5ecb6f395152609bdc40660d9b593dca63 <e519a404a5bbba37693cb10fa61794a5fce4fd9b

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 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

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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