CVE-2026-45855
Description
A flaw was found in the Linux kernel's libata-scsi component. This vulnerability allows for a denial of service (DoS) where non-Native Command Queuing (NCQ) commands can experience significant delays or complete starvation. This occurs when non-NCQ commands are issued while NCQ commands are actively being processed, particularly in systems utilizing multiple submission queues, preventing the non-NCQ commands from being executed.
Statement
This vulnerability is rated as Moderate impact for Red Hat Enterprise Linux because the risk is confined to a local denial of service via I/O starvation, with no impact on confidentiality or system integrity. Triggering this condition requires an attacker or workload to issue non-NCQ operations alongside saturated NCQ command streams on multi-queue host adapters. Although affected storage devices may experience stalled or severely delayed processing of specific commands, the flaw cannot lead to privilege escalation or system takeover.
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 | 5.5 | N/A |
| Attack Vector | Local | Local | N/A |
| Attack Complexity | Low | Low | N/A |
| Privileges Required | Low | Low | N/A |
| User Interaction | None | None | N/A |
| Scope | Unchanged | Unchanged | N/A |
| Confidentiality | None | None | N/A |
| Integrity Impact | None | None | N/A |
| Availability Impact | High | High | N/A |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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