CVE-2026-93045
개요
A flaw was found in the Linux kernel's Berkeley Packet Filter (BPF) arena component. The bpf_arena_free_pages() function incorrectly handles scalar arena addresses. When a scalar value is below the arena base, it can lead to an out-of-range memory offset. This issue could allow a local attacker to reuse memory addresses outside the intended arena mapping, potentially leading to memory corruption.
내용
This vulnerability is rated as having a Moderate impact for Red Hat Enterprise Linux because exploitation requires local access with elevated capabilities to load and manage BPF programs, restricting the exposed attack surface on standard installations. By default, Red Hat Enterprise Linux disables unprivileged extended Berkeley Packet Filter (eBPF) execution, preventing standard users from interacting with the arena subsystem. As a result, potential memory corruption is constrained to environments where untrusted users are explicitly granted administrative privileges such as CAP_BPF or CAP_SYS_ADMIN.
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 | 7 | N/A | 7.8 |
| 공격 벡터 | Local | N/A | Local |
| 공격 복잡성 | High | N/A | Low |
| 필요한 권한 | Low | N/A | Low |
| 사용자 상호 작용 | None | N/A | None |
| 범위 | Unchanged | N/A | Unchanged |
| 기밀성 | High | N/A | High |
| 무결성에 미치는 영향 | High | N/A | High |
| 가용성에 미치는 영향 | High | N/A | High |
벡터
Red Hat: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
cve.org: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
취약점 이해 (CWE)
Integrity,Availability,Confidentiality
Technical Impact: Modify Memory; DoS: Crash, Exit, or Restart; Execute Unauthorized Code or Commands
This weakness may result in the corruption of memory, and perhaps instructions, possibly leading to a crash. If the corrupted memory can be effectively controlled, it may be possible to execute arbitrary code.
