Linux Kernel up to 6.4.4 IRQ pci_endpoint_test_remove use after free

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.4.4 and classified as critical. The impacted element is the function pci_endpoint_test_remove of the component IRQ Handler. Executing a manipulation can lead to use after free. This vulnerability appears as CVE-2023-54326. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 6.4.4 and classified as critical. This vulnerability affects the function pci_endpoint_test_remove of the component IRQ Handler. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: misc: pci_endpoint_test: Free IRQs before removing the device In pci_endpoint_test_remove(), freeing the IRQs after removing the device creates a small race window for IRQs to be received with the test device memory already released, causing the IRQ handler to access invalid memory, resulting in an oops. Free the device IRQs before removing the device to avoid this issue.

The advisory is available at git.kernel.org. This vulnerability was named CVE-2023-54326 since 12/30/2025. The exploitation appears to be easy. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 01/02/2026).

Upgrading to version 4.19.291, 5.4.251, 5.10.188, 5.15.121, 6.1.40 or 6.4.5 eliminates this vulnerability. Applying the patch fb7f8bdb886f2ebf35ee5edaf2bf5f02b063ddb7/dd2210379205fcd23a9d8869b0cef90e3770577c/cdf9a7e2cdc7a5464e3cc6d0b715ba2b1d215521/14bdee38e96c7d37ca15e7bea50411eee25fe315/c2dba13bc0c62b79a3cbe4bfe5faa32231bf9b55/38d12bcf4e2ce3d285eb29644a79a54f42040fab/f61b7634a3249d12b9daa36ffbdb9965b6f24c6c is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2025-2941). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

• Open Source Linux Kernel

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 4.19.290
• 5.4.250
• 5.10.187
• 5.15.120
• 6.1.0
• 6.1.1
• 6.1.2
• 6.1.3
• 6.1.4
• 6.1.5
• 6.1.6
• 6.1.7
• 6.1.8
• 6.1.9
• 6.1.10
• 6.1.11
• 6.1.12
• 6.1.13
• 6.1.14
• 6.1.15
• 6.1.16
• 6.1.17
• 6.1.18
• 6.1.19
• 6.1.20
• 6.1.21
• 6.1.22
• 6.1.23
• 6.1.24
• 6.1.25
• 6.1.26
• 6.1.27
• 6.1.28
• 6.1.29
• 6.1.30
• 6.1.31
• 6.1.32
• 6.1.33
• 6.1.34
• 6.1.35
• 6.1.36
• 6.1.37
• 6.1.38
• 6.1.39
• 6.4.0
• 6.4.1
• 6.4.2
• 6.4.3
• 6.4.4

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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CPE 2.2info

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Exploitinginfo

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Sourcesinfo

Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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