CVE-2022-50742
説明
A flaw was found in the Linux kernel's misc: ocxl component. A local attacker with low privileges could exploit a reference count leak in the afu_ioctl() function. This flaw occurs when ocxl_irq_set_handler fails to call eventfd_ctx_put to release a reference count obtained by eventfd_ctx_fdget. This could lead to a denial of service (DoS) due to resource exhaustion.
CVSS (Common Vulnerability Scoring System) のスコアの詳細
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).
以下の CSVV メトリクスおよびスコアは予備的で、再検討の対象となります。
CVSS v3 スコアの内訳
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| ベーススコア | 5.5 | N/A | N/A |
| 攻撃ベクトル | Local | N/A | N/A |
| 攻撃の複雑さ | Low | N/A | N/A |
| 必要な権限 | Low | N/A | N/A |
| ユーザー関与レベル | None | N/A | N/A |
| 範囲 | Unchanged | N/A | N/A |
| 機密性 | None | N/A | N/A |
| 完全性への影響 | None | N/A | N/A |
| 可用性への影響 | High | N/A | N/A |
ベクトル
Red Hat: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
脆弱性の原因 (CWE) の理解
Availability
Technical Impact: DoS: Resource Consumption (Other); DoS: Resource Consumption (Memory); DoS: Resource Consumption (CPU)
An attacker that can influence the allocation of resources that are not properly released could deplete the available resource pool and prevent all other processes from accessing the same type of resource. Frequently-affected resources include memory, CPU, disk space, power or battery, etc.
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