CVE-2025-40330
Description
A flaw was found in the Linux kernel's Broadcom NetXtreme-C/E (bnxt_en) network driver. During system shutdown via bnxt_shutdown(), only packet DMA is stopped through netif_close(), but firmware DMA operations for trace logging continue. If the system performs a kexec to boot a new kernel, the ongoing firmware DMA writes corrupt memory in the new kernel, potentially leading to system crashes, data corruption, or security vulnerabilities in the newly booted kernel.
Statement
This vulnerability affects systems using Broadcom NetXtreme-C/E network adapters that perform kexec operations. The memory corruption occurs during the transition to a new kernel, making this particularly relevant for systems that rely on kexec for fast reboots or crash dump collection.
Mitigation
To mitigate this issue, prevent the bnxt_en module from being loaded if Broadcom NetXtreme-C/E network adapters are not required. See https://access.redhat.com/solutions/41278 for instructions on how to blacklist a kernel module.
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 | 5.2 | N/A | N/A |
| Attack Vector | Local | N/A | N/A |
| Attack Complexity | High | N/A | N/A |
| Privileges Required | High | N/A | N/A |
| User Interaction | None | N/A | N/A |
| Scope | Unchanged | N/A | N/A |
| Confidentiality | Low | N/A | N/A |
| Integrity Impact | Low | N/A | N/A |
| Availability Impact | High | N/A | N/A |
Vector
Red Hat: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:H
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