Stack-based buffer overflow in libril_sem.so prior to SMR Aug-2026 Release 1 allows privileged local attackers to execute arbitrary code. (CVE-2026-21068)
A stack-based buffer overflow vulnerability exists in libril_sem.so prior to the SMR Aug-2026 Release 1. This flaw allows privileged local attackers to execute arbitrary code on affected systems. The vulnerability requires local access with high privileges and does not involve user interaction. No patch information is currently provided.
AI Analysis
Technical Summary
CVE-2026-21068 is a stack-based buffer overflow vulnerability in the shared library libril_sem.so affecting versions prior to SMR Aug-2026 Release 1. The flaw enables attackers with privileged local access to execute arbitrary code, potentially compromising system integrity. The vulnerability has a high severity rating and a CVSS 4.0 vector indicating local attack vector, low attack complexity, no user interaction, and high impacts on confidentiality, integrity, and availability. No known exploits in the wild or patch details are currently available.
Potential Impact
Privileged local attackers can exploit this vulnerability to execute arbitrary code, which may lead to full system compromise or unauthorized control over affected systems. The high severity indicates significant risk if exploited.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict privileged local access to trusted users only.
Stack-based buffer overflow in libril_sem.so prior to SMR Aug-2026 Release 1 allows privileged local attackers to execute arbitrary code. (CVE-2026-21068)
Description
A stack-based buffer overflow vulnerability exists in libril_sem.so prior to the SMR Aug-2026 Release 1. This flaw allows privileged local attackers to execute arbitrary code on affected systems. The vulnerability requires local access with high privileges and does not involve user interaction. No patch information is currently provided.
CVSS v4.0
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-21068 is a stack-based buffer overflow vulnerability in the shared library libril_sem.so affecting versions prior to SMR Aug-2026 Release 1. The flaw enables attackers with privileged local access to execute arbitrary code, potentially compromising system integrity. The vulnerability has a high severity rating and a CVSS 4.0 vector indicating local attack vector, low attack complexity, no user interaction, and high impacts on confidentiality, integrity, and availability. No known exploits in the wild or patch details are currently available.
Potential Impact
Privileged local attackers can exploit this vulnerability to execute arbitrary code, which may lead to full system compromise or unauthorized control over affected systems. The high severity indicates significant risk if exploited.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict privileged local access to trusted users only.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-9qx8-f834-w4gq
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-21068"]
- Ecosystems
- []
- Database Specific Severity
- HIGH
- Cvss Version
- 4.0
Threat ID: 6a79f0e0bf8831d539f620d4
Added to database: 08/10/2026, 15:40:16 UTC
Last enriched: 08/10/2026, 16:01:35 UTC
Last updated: 08/11/2026, 03:41:00 UTC
Views: 2
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