Password disclosure via uncleared USB keyboard queue
Published Dec 9, 2025 · Updated Dec 9, 2025
Information exposure in TianoCore EDK II before edk2-stable202511 allows local users to recover password keystrokes from firmware memory. The USB keyboard driver leaves password characters in its circular key queue after password entry instead of clearing the backing memory. Low-privileged local access and direct examination of that memory disclose some or all of a password and enable later privilege escalation.
Summary
What happened
Information exposure in TianoCore EDK II before edk2-stable202511 allows local users to recover password keystrokes from firmware memory. The USB keyboard driver leaves password characters in its circular key queue after password entry instead of clearing the backing memory. Low-privileged local access and direct examination of that memory disclose some or all of a password and enable later privilege escalation.
The record
- CVE
- CVE-2024-38798
- Published
- Dec 9, 2025
- Updated
- Dec 9, 2025
- Vendor
- TianoCore
- Product
- EDK II
- Classifications
- CWE-200, T1056.001
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Dec 9, 2025CVE publishedPublication date reported by the CVE source.
- Dec 9, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <edk2-stable202511
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo