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 SMR Aug-2026 Release 1. This flaw allows privileged local attackers to execute arbitrary code. The vulnerability is identified as CVE-2026-21068 and has a high severity rating with a CVSS score of 7.8.
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 permits attackers with local privileged access to execute arbitrary code, potentially compromising confidentiality, integrity, and availability of the affected system. The vulnerability is classified under CWE-121 (Stack-based Buffer Overflow) and has a CVSS v3.1 score of 7.8, indicating high severity with low attack complexity and no user interaction required.
Potential Impact
Successful exploitation allows a privileged local attacker to execute arbitrary code, leading to full compromise of the affected system's confidentiality, integrity, and availability. This could result in unauthorized control over the system or disruption of services.
Mitigation Recommendations
A fix is available in SMR Aug-2026 Release 1. Users should apply this official patch to remediate the vulnerability. No additional mitigation guidance is provided, and patching is the recommended action.
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 SMR Aug-2026 Release 1. This flaw allows privileged local attackers to execute arbitrary code. The vulnerability is identified as CVE-2026-21068 and has a high severity rating with a CVSS score of 7.8.
CVSS v3.1
Score 7.8high
Weaknesses
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 permits attackers with local privileged access to execute arbitrary code, potentially compromising confidentiality, integrity, and availability of the affected system. The vulnerability is classified under CWE-121 (Stack-based Buffer Overflow) and has a CVSS v3.1 score of 7.8, indicating high severity with low attack complexity and no user interaction required.
Potential Impact
Successful exploitation allows a privileged local attacker to execute arbitrary code, leading to full compromise of the affected system's confidentiality, integrity, and availability. This could result in unauthorized control over the system or disruption of services.
Mitigation Recommendations
A fix is available in SMR Aug-2026 Release 1. Users should apply this official patch to remediate the vulnerability. No additional mitigation guidance is provided, and patching is the recommended action.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-9qx8-f834-w4gq
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-21068"]
- Database Specific Severity
- HIGH
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a79f0e0bf8831d539f620d4
Added to database: 08/10/2026, 15:40:16 UTC
Last enriched: 08/19/2026, 16:25:09 UTC
Last updated: 09/23/2026, 01:47:41 UTC
Views: 27
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