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CVE Watch1 jul 2026

CVE-2026-45259

sigqueue(2) was marked as permitted in capability mode with the introduction of Capsicum in 2011, but the implementation of kern_sigqueue di

CVSS

6.5

Medio

EPSS

0.1%

p3

KEV

—

Exploit Today

1

0-100

Publicado: 27 jun 2026 · Última mod.: 1 jul 2026 · CWE-266

EPSS · 30d
0.1%EPSS · 30 días0.1%
2026-09-282026-10-25
Descripción técnica

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.

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