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 HatNVDcve.org
ベーススコア5.5N/AN/A
攻撃ベクトルLocalN/AN/A
攻撃の複雑さLowN/AN/A
必要な権限LowN/AN/A
ユーザー関与レベルNoneN/AN/A
範囲UnchangedN/AN/A
機密性NoneN/AN/A
完全性への影響NoneN/AN/A
可用性への影響HighN/AN/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.

よくある質問

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