CVE-2023-54030
Description
A flaw was found in the Linux kernel's io_uring subsystem. When using multishot receive operations, completion queue entries (CQEs) can overflow without proper limits. This can lead to excessive memory consumption, performance degradation, and in worst cases, an out-of-memory (OOM) condition for the affected task.
Statement
This vulnerability allows a local user to exhaust memory resources through io_uring multishot receive operations. While this can cause denial of service via OOM, the impact is limited to the user's own task and does not directly affect system-wide stability. Exploitation requires intentional misuse of the io_uring API by a local user.
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).
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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