CVE-2022-49003
Description
A vulnerability was found in the Linux kernel's NVMe driver, involving a race condition in multipath configurations with RDMA connections. The nvme_ns_head list that tracks NVMe namespaces is not properly synchronized with the SRCU lock in the nvme_mpath_revalidate_paths() function. This can cause a use-after-free situation when namespaces are removed from the list without proper synchronization, potentially leading to a NULL pointer dereference.
Statement
This vulnerability is considered moderate severity because it requires specific conditions to trigger, such as concurrent scan operations and the use of multipath configurations with NVMe over RDMA. While it can lead to a kernel panic due to a NULL pointer dereference, it is unlikely to be easily exploited under normal usage patterns. The issue only occurs when namespaces are simultaneously removed and accessed without proper synchronization, which is less common in typical workloads.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
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 | 4.7 | 4.7 | 9.8 |
| Attack Vector | Local | Local | Network |
| Attack Complexity | High | High | Low |
| Privileges Required | Low | Low | None |
| User Interaction | None | None | None |
| Scope | Unchanged | Unchanged | Unchanged |
| Confidentiality | None | None | High |
| Integrity Impact | None | None | High |
| Availability Impact | High | High | High |
Vector
Red Hat: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
cve.org: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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