Linux Kernel up to 6.4.4 nfp __dev_mc_unsync privilege escalation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.6$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 6.4.4. This vulnerability affects the function __dev_mc_unsync of the component nfp. The manipulation results in an unknown weakness. This vulnerability was named CVE-2023-54133. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 6.4.4. Affected is the function __dev_mc_unsync of the component nfp. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: nfp: clean mc addresses in application firmware when closing port When moving devices from one namespace to another, mc addresses are cleaned in software while not removed from application firmware. Thus the mc addresses are remained and will cause resource leak. Now use `__dev_mc_unsync` to clean mc addresses when closing port.

The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2023-54133 since 12/24/2025. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 01/03/2026).

The vulnerability scanner Nessus provides a plugin with the ID 280056 (Linux Distros Unpatched Vulnerability : CVE-2023-54133), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.4.5 eliminates this vulnerability. Applying the patch c427221733d49fd1e1b79b4a86746acf3ef660e7/cc7eab25b1cf3f9594fe61142d3523ce4d14a788 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 (280056) and CERT Bund (WID-SEC-2025-2929). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • Open Source Linux Kernel

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.0
VulDB Meta Temp Score: 7.6

VulDB Base Score: 8.0
VulDB Temp Score: 7.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Privilege escalation
CWE: Unknown
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: 280056
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2023-54133

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.4.5
Patch: c427221733d49fd1e1b79b4a86746acf3ef660e7/cc7eab25b1cf3f9594fe61142d3523ce4d14a788

Timelineinfo

12/24/2025 Advisory disclosed
12/24/2025 +0 days CVE reserved
12/24/2025 +0 days VulDB entry created
01/03/2026 +10 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2023-54133 (🔒)
GCVE (CVE): GCVE-0-2023-54133
GCVE (VulDB): GCVE-100-338088
CERT Bund: WID-SEC-2025-2929 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 12/24/2025 15:07
Updated: 01/03/2026 05:37
Changes: 12/24/2025 15:07 (58), 12/27/2025 00:36 (2), 01/03/2026 05:37 (7)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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