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CVE-2026-99244

kernel: kernel: Denial of Service via busy-wait loop during PID namespace cleanup

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Severity

Low

Red Hat Product Security

3.3

CVSS 3.1

Review impact separately from score.

Published · November 3, 2026

Updated · November 5, 2026

Description

A flaw was found in the Linux kernel's process ID (PID) namespace subsystem. This vulnerability allows a local user to cause a Denial of Service (DoS) through excessive CPU consumption. During namespace cleanup, repeated internal signal notifications can prevent the process reaper from entering a sleep state as expected, trapping it in a continuous busy-wait loop.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 3.3
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

CWE-835 · Loop with Unreachable Exit Condition