CVE-2023-53251

Kernel crash via unchecked receive-queue array

Published Sep 15, 2025 · Updated Sep 15, 2025

NULL pointer dereference in the Linux iwlwifi PCIe driver allows local users to crash the kernel through an MSI-X receive interrupt. The iwl_pcie_irq_rx_msix_handler function derives rxq from trans_pcie->rxq before verifying that the array exists, then dereferences rxq to schedule NAPI. Exploitation requires low-privileged local access and affected Intel PCIe Wi-Fi hardware; a successful trigger interrupts the system through a kernel crash.

CVSS severity5.5
Medium
EPSS probability0.14%
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 iwlwifi PCIe driver allows local users to crash the kernel through an MSI-X receive interrupt. The iwl_pcie_irq_rx_msix_handler function derives rxq from trans_pcie->rxq before verifying that the array exists, then dereferences rxq to schedule NAPI. Exploitation requires low-privileged local access and affected Intel PCIe Wi-Fi hardware; a successful trigger interrupts the system through a kernel crash.

The record

CVE
CVE-2023-53251
Published
Sep 15, 2025
Updated
Sep 15, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 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=5.12
  2. Affected versionversion=abc599efa67bb4138536360e07d677052b19e392 <1902f1953b8ba100ee8705cb8a6f1a9795550eca
  3. Affected versionversion=abc599efa67bb4138536360e07d677052b19e392 <2d690495eb2766d58e25c83676f422219c4fcf18
  4. Affected versionversion=abc599efa67bb4138536360e07d677052b19e392 <390e44efcf4d390b5053ad112553155d2d097c73
  5. Affected versionversion=abc599efa67bb4138536360e07d677052b19e392 <3b9de981fe7f1c6e07c7b852421ad69be3d4b6c2
  6. Affected versionversion=abc599efa67bb4138536360e07d677052b19e392 <f71d0fc407dd028416bec002ddcc62f5acb0346a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.12; version=abc599efa67bb4138536360e07d677052b19e392 <1902f1953b8ba100ee8705cb8a6f1a9795550eca; version=abc599efa67bb4138536360e07d677052b19e392 <2d690495eb2766d58e25c83676f422219c4fcf18; version=abc599efa67bb4138536360e07d677052b19e392 <390e44efcf4d390b5053ad112553155d2d097c73; version=abc599efa67bb4138536360e07d677052b19e392 <3b9de981fe7f1c6e07c7b852421ad69be3d4b6c2; version=abc599efa67bb4138536360e07d677052b19e392 <f71d0fc407dd028416bec002ddcc62f5acb0346a

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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.

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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.

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Technologies

Your stack

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Your stack

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