CVE-2022-50667

Description

A memory leak vulnerability was found in the VMware graphics driver (vmwgfx) in the Linux kernel. In vmw_mksstat_add_ioctl(), when copying the description string from userspace fails with -EFAULT, the allocated page for the instance descriptor is not freed. This leads to memory leakage that can cause resource exhaustion.

Statement

This is a memory leak in the VMware graphics driver affecting systems running as VMware guests. The leak occurs only when copying data from userspace fails, which limits the attack surface to local users with graphics access.

Mitigation

To mitigate this issue, prevent the vmwgfx module from being loaded. See https://access.redhat.com/solutions/41278 for instructions on how to blacklist a kernel module.

Common Vulnerability Scoring System (CVSS) Score Details

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).

CVSS v3 Score Breakdown

Red HatNVDcve.org
Base Score5.5N/AN/A
Attack VectorLocalN/AN/A
Attack ComplexityLowN/AN/A
Privileges RequiredLowN/AN/A
User InteractionNoneN/AN/A
ScopeUnchangedN/AN/A
ConfidentialityNoneN/AN/A
Integrity ImpactNoneN/AN/A
Availability ImpactHighN/AN/A

Vector

Red Hat: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Understanding the Weakness (CWE)

CWE-771

Availability

Technical Impact: DoS: Resource Consumption (Other)

An attacker that can influence the allocation of resources that are not properly maintained could deplete the available resource pool and prevent all other processes from accessing the same type of resource.

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