PT-2026-53061 · Undefined · Undefined
Publicado
2026-06-27
·
Atualizado
2026-06-27
·
CVE-2026-45259
Nenhuma
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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.
Incorrect Privilege Assignment
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