Linux Kernel up to 6.2.2 iommufd copy_from_user initialization

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in Linux Kernel up to 6.2.2. This issue affects the function copy_from_user of the component iommufd. This manipulation causes initialization. This vulnerability is handled as CVE-2023-54034. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel up to 6.2.2. Affected by this vulnerability is the function copy_from_user of the component iommufd. The manipulation with an unknown input leads to a initialization vulnerability. The CWE definition for the vulnerability is CWE-665. The product does not initialize or incorrectly initializes a resource, which might leave the resource in an unexpected state when it is accessed or used. The impact remains unknown. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: iommufd: Make sure to zero vfio_iommu_type1_info before copying to user Missed a zero initialization here. Most of the struct is filled with a copy_from_user(), however minsz for that copy is smaller than the actual struct by 8 bytes, thus we don't fill the padding.

The advisory is shared at git.kernel.org. This vulnerability is known as CVE-2023-54034 since 12/24/2025. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 12/26/2025).

The vulnerability scanner Nessus provides a plugin with the ID 279956 (Linux Distros Unpatched Vulnerability : CVE-2023-54034), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.2.3 eliminates this vulnerability. Applying the patch 7adcec686e4d699c169d34c722132b2bce5232cb/b3551ead616318ea155558cdbe7e91495b8d9b33 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 databases at Tenable (279956) and CERT Bund (WID-SEC-2025-2920). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

  • Open Source Linux Kernel

Productinfo

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Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Initialization
CWE: CWE-665
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 279956
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2023-54034

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.2.3
Patch: 7adcec686e4d699c169d34c722132b2bce5232cb/b3551ead616318ea155558cdbe7e91495b8d9b33

Timelineinfo

12/24/2025 Advisory disclosed
12/24/2025 +0 days CVE reserved
12/24/2025 +0 days VulDB entry created
12/26/2025 +2 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2023-54034 (🔒)
GCVE (CVE): GCVE-0-2023-54034
GCVE (VulDB): GCVE-100-338221
CERT Bund: WID-SEC-2025-2920 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 12/24/2025 15:31
Updated: 12/26/2025 07:47
Changes: 12/24/2025 15:31 (59), 12/25/2025 10:54 (7), 12/26/2025 07:47 (2)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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