CVE-2025-40195
Description
A flaw was found in kernel. This vulnerability allows local denial-of-service via a NULL pointer dereference in pid_nr_ns() when called with a NULL PID namespace.
Statement
The vulnerability is a NULL pointer dereference in pid_nr_ns() when it is called with a NULL PID namespace, leading to a kernel panic from paths such as __task_pid_nr_ns() on certain platforms. In realistic setups, this is a local denial-of-service issue, likely requiring specific kernel configuration or privileges to trigger reliably. In a worst-case scenario where unprivileged users can reach this path in a controlled way, any local user could crash the system.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 5.5 | N/A | N/A |
| Attack Vector | Local | N/A | N/A |
| Attack Complexity | Low | N/A | N/A |
| Privileges Required | Low | N/A | N/A |
| User Interaction | None | N/A | N/A |
| Scope | Unchanged | N/A | N/A |
| Confidentiality | None | N/A | N/A |
| Integrity Impact | None | N/A | N/A |
| Availability Impact | High | N/A | N/A |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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