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CVE-2025-4275 (GCVE-0-2025-4275)

Vulnerability from cvelistv5 – Published: 2025-06-11 00:25 – Updated: 2025-08-14 05:58
VLAI
Title
SecureFlashDxe: Incorrect UEFI variable attributes check allows usage of invalid certificate
Summary
A vulnerability in the digital signature verification process does not properly validate variable attributes which allows an attacker to bypass signature verification by creating a non-authenticated NVRAM variable. An attacker may to execute arbitrary signed UEFI code and bypass Secure Boot.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-06-11 13:38 UTC
CWE
  • cwe-284: Improper Access Control
Assigner
References
Impacted products
Vendor Product Version CPE status
Insyde Software InsydeH2O Affected: Kernel 5.2 , < 05.2A.16 (Tag)
Affected: Kernel 5.3 , < 05.39.16 (Tag)
Affected: Kernel 5.4 , < 05.47.16 (Tag)
Affected: Kernel 5.5 , < 05.55.16 (Tag)
Affected: Kernel 5.6 , < 05.62.16 (Tag)
Affected: Kernel 5.7 , < 05.71.16 (Tag)
guessed Create a notification for this product.
Date Public
2025-06-10 00:18
Credits
Thanks to Nikolaj Schlej, independent firmware security researcher, for reporting the vulnerability and engaging in this coordinated disclosure.
Show details on NVD website
To clipboard 

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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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