keys/trusted_keys: return immediately after TPM unseal failure
CVSS score
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EPSS probability
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Risk score
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Published
3 h ago
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Vulnerability description
DayBreach AI Explanation
Verified against sourcesSources read
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Source agreement
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Evidence confidence
%63
Short explanation
A vulnerability has been resolved in the Linux kernel trusted_keys subsystem where execution does not return immediately after a TPM unseal failure. When the unseal operation fails, pcrlock() proceeds, and if it succeeds, its return value overwrites the unseal error, causing key instantiation to incorrectly succeed.
This vulnerability can cause error handling to fail when TPM unseal operations fail, potentially allowing key instantiation to succeed improperly when it should have failed.
What should be done?
- Follow vendor advisories and apply updates
Chain of evidence and sources
trusted_tpm_unseal() fonksiyonu, TPM mühür açma işlemi başarısız olduğunda pcrlock() fonksiyonuna ilerlemektedir.
pcrlock() fonksiyonunun başarılı olması, unseal hata değerinin üzerine yazarak anahtar oluşturmanın başarılı olmasına yol açmaktadır.
Show the technical text from the sources
In the Linux kernel, the following vulnerability has been resolved: keys/trusted_keys: return immediately after TPM unseal failure trusted_tpm_unseal() proceeds to pcrlock() when the TPM unseal operation fails. If pcrlock() succeeds, its return value overwrites the unseal error, causing key instantiation to succeed. Return immediately when unseal fails to preserve the original error.
This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.
IMPACT: Affected Products and Software
RED HAT CSAF/VEX: Product Impact Check
SCORING: CVSS from Multiple Sources
CVSS Scores
The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.
| SCORE | VERSION | SEVERITY | VECTOR | SOURCE |
|---|---|---|---|---|
| The sources have not yet published a verified CVSS metric. | ||||
Patch and Remediation Guide
Solution & Remediation Advisory
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Public exploit and active exploitation status
Verified exploit intelligence
No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.
Weakness Classification and Attack Patterns (CWE & CAPEC)
CWE - Common Weakness Enumeration
While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-99221 is associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-99221 weaknesses.
Official Sources and Advisories
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