Vulnerability Monitor

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CVE-2026-45250


The setcred(2) system call is only available to privileged users. However, before the privilege level of the caller is checked, the user-supplied list of supplementary groups is copied into a fixed-size kernel stack buffer without first validating its length. If the supplied list exceeds the capacity of that buffer, a stack buffer overflow occurs. Because the bounds check on the supplementary groups list occurs after the kernel stack buffer has already been written, an unprivileged local user may trigger the overflow without holding any special privilege. Successful exploitation may allow an attacker to execute arbitrary code in the context of the kernel, allowing an unprivileged local user to gain elevated privileges on the affected system.


Security Impact Summary

This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 7.8, requiring local system access to exploit with relatively low complexity without requiring user interaction requiring only low-level privileges . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 1 product from freebsd organizations running these solutions should prioritize assessment and patching.

Historical Context

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.


Published

2026-05-21T09:16:30.010

Last Modified

2026-05-22T08:16:14.847

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.8 (HIGH)

Weaknesses
  • Type: Secondary
    CWE-121

Affected Vendors & Products
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 14.4 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

References

How SecUtils Interprets This CVE

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.