CVE-2023-54326

Kernel oops via IRQ teardown race

Published Dec 30, 2025 · Updated Dec 30, 2025

Use-after-free in the Linux kernel pci_endpoint_test driver allows local users to interrupt kernel service during PCI test-device removal. In pci_endpoint_test_remove(), the driver releases the test device before freeing its IRQs, so a late interrupt handler dereferences already-freed device memory. Triggering the race requires local access to the PCI endpoint test interface while the device is removed; the late access produces a kernel oops.

CVSS severity7.8
High
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

Use-after-free in the Linux kernel pci_endpoint_test driver allows local users to interrupt kernel service during PCI test-device removal. In pci_endpoint_test_remove(), the driver releases the test device before freeing its IRQs, so a late interrupt handler dereferences already-freed device memory. Triggering the race requires local access to the PCI endpoint test interface while the device is removed; the late access produces a kernel oops.

The record

CVE
CVE-2023-54326
Published
Dec 30, 2025
Updated
Dec 30, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 30, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 30, 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=4.19
  2. Affected versionversion=e03327122e2c8e6ae4565ef5b3d3cbe4364546a1 <14bdee38e96c7d37ca15e7bea50411eee25fe315
  3. Affected versionversion=e03327122e2c8e6ae4565ef5b3d3cbe4364546a1 <38d12bcf4e2ce3d285eb29644a79a54f42040fab
  4. Affected versionversion=e03327122e2c8e6ae4565ef5b3d3cbe4364546a1 <c2dba13bc0c62b79a3cbe4bfe5faa32231bf9b55
  5. Affected versionversion=e03327122e2c8e6ae4565ef5b3d3cbe4364546a1 <cdf9a7e2cdc7a5464e3cc6d0b715ba2b1d215521
  6. Affected versionversion=e03327122e2c8e6ae4565ef5b3d3cbe4364546a1 <dd2210379205fcd23a9d8869b0cef90e3770577c
  7. Affected versionversion=e03327122e2c8e6ae4565ef5b3d3cbe4364546a1 <f61b7634a3249d12b9daa36ffbdb9965b6f24c6c
  8. Affected versionversion=e03327122e2c8e6ae4565ef5b3d3cbe4364546a1 <fb7f8bdb886f2ebf35ee5edaf2bf5f02b063ddb7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.19; version=e03327122e2c8e6ae4565ef5b3d3cbe4364546a1 <14bdee38e96c7d37ca15e7bea50411eee25fe315; version=e03327122e2c8e6ae4565ef5b3d3cbe4364546a1 <38d12bcf4e2ce3d285eb29644a79a54f42040fab; version=e03327122e2c8e6ae4565ef5b3d3cbe4364546a1 <c2dba13bc0c62b79a3cbe4bfe5faa32231bf9b55; version=e03327122e2c8e6ae4565ef5b3d3cbe4364546a1 <cdf9a7e2cdc7a5464e3cc6d0b715ba2b1d215521; version=e03327122e2c8e6ae4565ef5b3d3cbe4364546a1 <dd2210379205fcd23a9d8869b0cef90e3770577c; version=e03327122e2c8e6ae4565ef5b3d3cbe4364546a1 <f61b7634a3249d12b9daa36ffbdb9965b6f24c6c; version=e03327122e2c8e6ae4565ef5b3d3cbe4364546a1 <fb7f8bdb886f2ebf35ee5edaf2bf5f02b063ddb7

Published CVSS scores

7.8Linux CNACVSS: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

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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