CVEvulnerability

CVE-2026-45259

6.5 MEDIUM Published 2026-06-27 Modified 2026-07-01 Official page ↗
Status
Analyzed
Published
2026-06-27
Last modified
2026-07-01
Assigner
[email protected]
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
6.5 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Weaknesses
CWE-266

Description

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.

Affected configurations

• freebsd freebsd 14.3 • freebsd freebsd 14.4 • freebsd freebsd 15.0

Related

Weakness · CWE (1)

  • CWE-266 Incorrect Privilege Assignment weakness

References