What’s Vulnerable › Vulnerabilities

CVE-2022-34376

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-02-10 · updated 2026-06-17
• Weakness: CWE-119

Description

Dell PowerEdge BIOS and Dell Precision BIOS contain an improper input validation vulnerability. A local authenticated malicious user may potentially exploit this vulnerability by manipulating an SMI to cause a denial of service during SMM.

Affected products

• Dell C4130 Firmware: before 2.16.0 — fixed in 2.16.0
• Dell C4140 Firmware: before 2.16.1 — fixed in 2.16.1
• Dell C6320 Firmware: before 2.16.0 — fixed in 2.16.0
• Dell C6420 Firmware: before 2.16.1 — fixed in 2.16.1
• Dell C6520 Firmware: before 1.8.2 — fixed in 1.8.2
• Dell C6525 Firmware: all versions
• Dell Dss8440 Firmware: before 2.16.1 — fixed in 2.16.1
• Dell Fc430 Firmware: before 2.16.0 — fixed in 2.16.0
• Dell Fc630 Firmware: before 2.16.0 — fixed in 2.16.0
• Dell Fc640 Firmware: before 2.16.1 — fixed in 2.16.1
• Dell Fc830 Firmware: before 2.16.0 — fixed in 2.16.0
• Dell M630 Firmware: before 2.16.0 — fixed in 2.16.0
• Dell M630P Firmware: before 2.16.0 — fixed in 2.16.0
• Dell M640 Firmware: before 2.16.1 — fixed in 2.16.1
• Dell M640P Firmware: before 2.16.1 — fixed in 2.16.1
• Dell M830 Firmware: before 2.16.0 — fixed in 2.16.0
• Dell M830P Firmware: before 2.16.0 — fixed in 2.16.0
• Dell Mx740C Firmware: before 2.16.1 — fixed in 2.16.1
• Dell Mx750C Firmware: before 1.8.2 — fixed in 1.8.2
• Dell Mx840C Firmware: before 2.16.1 — fixed in 2.16.1
• Dell Nx3230 Firmware: before 2.16.0 — fixed in 2.16.0
• Dell Nx3240 Firmware: before 2.16.1 — fixed in 2.16.1
• Dell Nx3330 Firmware: before 2.16.0 — fixed in 2.16.0
• Dell Nx3340 Firmware: before 2.16.1 — fixed in 2.16.1
• Dell Nx430 Firmware: before 2.16.0 — fixed in 2.16.0
• Dell Nx440 Firmware: before 2.11.1 — fixed in 2.11.1
• Dell R230 Firmware: before 2.16.0 — fixed in 2.16.0
• Dell R240 Firmware: before 2.11.1 — fixed in 2.11.1
• Dell R250 Firmware: before 1.4.2 — fixed in 1.4.2
• Dell R330 Firmware: before 2.16.0 — fixed in 2.16.0

How to fix

Upgrade to a fixed version: Dell C4130 Firmware 2.16.0; Dell C4140 Firmware 2.16.1; Dell C6320 Firmware 2.16.0; Dell C6420 Firmware 2.16.1; Dell C6520 Firmware 1.8.2; Dell Dss8440 Firmware 2.16.1; Dell Fc430 Firmware 2.16.0; Dell Fc630 Firmware 2.16.0; Dell Fc640 Firmware 2.16.1; Dell Fc830 Firmware 2.16.0; Dell M630 Firmware 2.16.0; Dell M630P Firmware 2.16.0. Check the vendor advisory for mitigations.

References

• https://www.dell.com/support/kbdoc/en-us/000206296/dsa-2022-204-dell-poweredge-improper-smm-communication-buffer-verification-vulnerability
• https://www.dell.com/support/kbdoc/en-us/000206296/dsa-2022-204-dell-poweredge-improper-smm-communication-buffer-verification-vulnerability

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