sigqueue(2) was marked as permitted in capability mode with the introduction of Capsicum in 2011, but the implementation of kern_sigqueue did not include a capability mode check restricting signal delivery to the calling process's own PID. A process in capability mode can use sigqueue(2) to send signals to any process it could signal following standard Unix permissions, bypassing the Capsicum sandbox restriction. A compromised sandboxed process could interfere with other processes, for example by sending SIGKILL or SIGSTOP. This could be any process running as the same user, or any process, for a superuser sandboxed process.
This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 6.5, requiring local system access to exploit with relatively low complexity without requiring user interaction requiring only low-level privileges . The vulnerability impacts and availability (service disruption) for affected systems. Impacting 1 product from freebsd organizations running these solutions should prioritize assessment and patching.
Reported in 2026, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.
2026-06-27T09:16:22.963
2026-07-01T14:04:51.957
Analyzed
CVSSv3.1: 6.5 (MEDIUM)
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Operating System | freebsd | freebsd | 14.3 | Yes |
| Operating System | freebsd | freebsd | 14.3 | Yes |
| Operating System | freebsd | freebsd | 14.3 | Yes |
| Operating System | freebsd | freebsd | 14.3 | Yes |
| Operating System | freebsd | freebsd | 14.3 | Yes |
| Operating System | freebsd | freebsd | 14.3 | Yes |
| Operating System | freebsd | freebsd | 14.3 | Yes |
| Operating System | freebsd | freebsd | 14.3 | Yes |
| Operating System | freebsd | freebsd | 14.3 | Yes |
| Operating System | freebsd | freebsd | 14.3 | Yes |
| Operating System | freebsd | freebsd | 14.3 | Yes |
| Operating System | freebsd | freebsd | 14.3 | Yes |
| Operating System | freebsd | freebsd | 14.3 | Yes |
| Operating System | freebsd | freebsd | 14.3 | Yes |
| Operating System | freebsd | freebsd | 14.3 | Yes |
| Operating System | freebsd | freebsd | 14.4 | Yes |
| Operating System | freebsd | freebsd | 14.4 | Yes |
| Operating System | freebsd | freebsd | 14.4 | Yes |
| Operating System | freebsd | freebsd | 14.4 | Yes |
| Operating System | freebsd | freebsd | 14.4 | Yes |
| Operating System | freebsd | freebsd | 14.4 | Yes |
| Operating System | freebsd | freebsd | 15.0 | Yes |
| Operating System | freebsd | freebsd | 15.0 | Yes |
| Operating System | freebsd | freebsd | 15.0 | Yes |
| Operating System | freebsd | freebsd | 15.0 | Yes |
| Operating System | freebsd | freebsd | 15.0 | Yes |
| Operating System | freebsd | freebsd | 15.0 | Yes |
| Operating System | freebsd | freebsd | 15.0 | Yes |
| Operating System | freebsd | freebsd | 15.0 | Yes |
| Operating System | freebsd | freebsd | 15.0 | Yes |
| Operating System | freebsd | freebsd | 15.0 | Yes |
SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For freebsd's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.