Out-of-bounds write in Keymaster trustlet prior to SMR Sep-2026 Release 1 allows local privileged attackers to write out-of-bounds memory. (CVE-2026-21085)
CVE-2026-21085 is an out-of-bounds write vulnerability in the Keymaster trustlet affecting versions prior to SMR Sep-2026 Release 1. This flaw allows local privileged attackers to write outside the intended memory bounds, potentially leading to memory corruption. The vulnerability has a high severity rating. No public exploits are known in the wild. Patch status is not confirmed from the provided data.
AI Analysis
Technical Summary
This vulnerability involves an out-of-bounds write in the Keymaster trustlet component before the SMR Sep-2026 Release 1 update. It permits local attackers with elevated privileges to write beyond allocated memory regions, which can cause memory corruption and potentially impact system integrity. The CVSS 4.0 vector indicates a local attack vector with low attack complexity and no user interaction required, but requires high privileges. The vulnerability is rated high severity by the source database. No patch or remediation details are provided in the available information.
Potential Impact
Local privileged attackers can exploit this vulnerability to write out-of-bounds memory, which may lead to memory corruption and compromise of the affected system's security. The impact is rated high severity, indicating significant risk if exploited.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or patch information is provided, users should monitor vendor communications for updates and apply the SMR Sep-2026 Release 1 or later once available.
Out-of-bounds write in Keymaster trustlet prior to SMR Sep-2026 Release 1 allows local privileged attackers to write out-of-bounds memory. (CVE-2026-21085)
Description
CVE-2026-21085 is an out-of-bounds write vulnerability in the Keymaster trustlet affecting versions prior to SMR Sep-2026 Release 1. This flaw allows local privileged attackers to write outside the intended memory bounds, potentially leading to memory corruption. The vulnerability has a high severity rating. No public exploits are known in the wild. Patch status is not confirmed from the provided data.
CVSS v4.0
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an out-of-bounds write in the Keymaster trustlet component before the SMR Sep-2026 Release 1 update. It permits local attackers with elevated privileges to write beyond allocated memory regions, which can cause memory corruption and potentially impact system integrity. The CVSS 4.0 vector indicates a local attack vector with low attack complexity and no user interaction required, but requires high privileges. The vulnerability is rated high severity by the source database. No patch or remediation details are provided in the available information.
Potential Impact
Local privileged attackers can exploit this vulnerability to write out-of-bounds memory, which may lead to memory corruption and compromise of the affected system's security. The impact is rated high severity, indicating significant risk if exploited.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or patch information is provided, users should monitor vendor communications for updates and apply the SMR Sep-2026 Release 1 or later once available.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-wgpx-9gqw-99p5
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-21085"]
- Ecosystems
- []
- Database Specific Severity
- HIGH
- Cvss Version
- 4.0
Threat ID: 6aa15f7cacd9273b496183b6
Added to database: 09/09/2026, 13:30:36 UTC
Last enriched: 09/09/2026, 13:58:38 UTC
Last updated: 09/10/2026, 01:52:00 UTC
Views: 3
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