CVE-2026-99254
개요
A flaw was found in the Linux kernel's io_uring subsystem. An unprivileged local user could cause a Denial of Service (DoS) by creating multiple interdependent asynchronous I/O rings and initiating task termination or cancellation. During cleanup, the kernel repeatedly floods the cancelling process with work callbacks, preventing it from completing its exit routines. This behavior results in high CPU utilization and causes the affected process to hang in an unkillable state for prolonged periods.
CVSS (Common Vulnerability Scoring System) 점수 세부 사항
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).
다음의 CVSS 지표 및 점수는 예비 정보로 검토 대상입니다.
CVSS v3 점수 분석
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| 기본 점수 | 3.3 | N/A | N/A |
| 공격 벡터 | Local | N/A | N/A |
| 공격 복잡성 | Low | N/A | N/A |
| 필요한 권한 | Low | N/A | N/A |
| 사용자 상호 작용 | None | N/A | N/A |
| 범위 | Unchanged | N/A | N/A |
| 기밀성 | None | N/A | N/A |
| 무결성에 미치는 영향 | None | N/A | N/A |
| 가용성에 미치는 영향 | Low | N/A | N/A |
벡터
Red Hat: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
취약점 이해 (CWE)
Availability
Technical Impact: DoS: Resource Consumption (CPU); DoS: Resource Consumption (Memory); DoS: Amplification
An infinite loop will cause unexpected consumption of resources, such as CPU cycles or memory. The software's operation may slow down, or cause a long time to respond.
