CVE-2026-98928
개요
A flaw was found in the Linux kernel's KVM (Kernel-based Virtual Machine) subsystem for ARM64. A local privileged user can cause a Denial of Service (DoS) by initializing a virtual machine with inconsistent Scalable Vector Extension (SVE) settings. This condition leads to a null pointer dereference when loading CPU state during a context switch, resulting in a hypervisor crash.
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 | 6.5 | 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 | Changed | N/A | N/A |
| 기밀성 | None | N/A | N/A |
| 무결성에 미치는 영향 | None | N/A | N/A |
| 가용성에 미치는 영향 | High | N/A | N/A |
벡터
Red Hat: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
취약점 이해 (CWE)
Availability
Technical Impact: DoS: Crash, Exit, or Restart
NULL pointer dereferences usually result in the failure of the process unless exception handling (on some platforms) is available and implemented. Even when exception handling is being used, it can still be very difficult to return the software to a safe state of operation.
Integrity,Confidentiality
Technical Impact: Execute Unauthorized Code or Commands; Read Memory; Modify Memory
In rare circumstances, when NULL is equivalent to the 0x0 memory address and privileged code can access it, then writing or reading memory is possible, which may lead to code execution.
