Stack-based buffer overflow in PROCA trustlet prior to SMR Sep-2026 Release 1 allows local privileged attackers to write out-of-bounds memory. (CVE-2026-21093)
A stack-based buffer overflow vulnerability exists in the PROCA trustlet prior to SMR Sep-2026 Release 1. This flaw allows local attackers with privileged access to write out-of-bounds memory, potentially leading to memory corruption. The vulnerability requires high attack complexity and privileges, with no user interaction needed. No known exploits are reported in the wild. The severity is assessed as medium based on available data.
AI Analysis
Technical Summary
CVE-2026-21093 describes a stack-based buffer overflow in the PROCA trustlet component before the SMR Sep-2026 Release 1 update. This vulnerability permits local attackers who already have privileged access to perform out-of-bounds memory writes. The vulnerability does not affect remote attackers and requires high attack complexity and privileges. The CVSS 4.0 vector indicates partial confidentiality impact and no impact on integrity or availability. No patch or vendor advisory information is provided in the input data.
Potential Impact
Local privileged attackers can exploit this vulnerability to write outside the bounds of allocated memory on the stack, which may lead to memory corruption. This could potentially affect the stability or security of the affected system component. There is no indication of remote exploitation or impact on confidentiality, integrity, or availability beyond the local scope.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no patch or official fix information is provided, users should monitor vendor communications for updates. Given the requirement for local privileged access, limiting privileged user access and monitoring for suspicious local activity may reduce risk until a fix is available.
Stack-based buffer overflow in PROCA trustlet prior to SMR Sep-2026 Release 1 allows local privileged attackers to write out-of-bounds memory. (CVE-2026-21093)
Description
A stack-based buffer overflow vulnerability exists in the PROCA trustlet prior to SMR Sep-2026 Release 1. This flaw allows local attackers with privileged access to write out-of-bounds memory, potentially leading to memory corruption. The vulnerability requires high attack complexity and privileges, with no user interaction needed. No known exploits are reported in the wild. The severity is assessed as medium based on available data.
CVSS v4.0
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-21093 describes a stack-based buffer overflow in the PROCA trustlet component before the SMR Sep-2026 Release 1 update. This vulnerability permits local attackers who already have privileged access to perform out-of-bounds memory writes. The vulnerability does not affect remote attackers and requires high attack complexity and privileges. The CVSS 4.0 vector indicates partial confidentiality impact and no impact on integrity or availability. No patch or vendor advisory information is provided in the input data.
Potential Impact
Local privileged attackers can exploit this vulnerability to write outside the bounds of allocated memory on the stack, which may lead to memory corruption. This could potentially affect the stability or security of the affected system component. There is no indication of remote exploitation or impact on confidentiality, integrity, or availability beyond the local scope.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no patch or official fix information is provided, users should monitor vendor communications for updates. Given the requirement for local privileged access, limiting privileged user access and monitoring for suspicious local activity may reduce risk until a fix is available.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-w482-83jg-c7v7
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-21093"]
- Ecosystems
- []
- Database Specific Severity
- MODERATE
- Cvss Version
- 4.0
Threat ID: 6aa15f7bacd9273b49618374
Added to database: 09/09/2026, 13:30:35 UTC
Last enriched: 09/09/2026, 13:57:25 UTC
Last updated: 09/09/2026, 18:52:00 UTC
Views: 2
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