CVE-2025-4275
SecureFlashDxe: Incorrect UEFI variable attributes check allows usage of invalid certificate
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 05.2A.16, 05.39.16, 05.47.16, 05.55.16, 05.62.16, and 1 more
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- 3 proofs of concept on GitHub
CISA's decision points: whether it is exploited, whether attacks can be automated, and how much control an attacker gets. Assessed (SSVC 2.0.3).What do these mean? →
- Exploitation: none
- Automatable: no
- Technical impact: total
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.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: total
- Record last updated
Affected versions
- Insyde Software InsydeH2O
From Kernel 5.2 · fixed in 05.2A.16; From Kernel 5.3 · fixed in 05.39.16; From Kernel 5.4 · fixed in 05.47.16; From Kernel 5.5 · fixed in 05.55.16; From Kernel 5.6 · fixed in 05.62.16; From Kernel 5.7 · fixed in 05.71.16