CVE-2022-50769
Description
A flaw was found in the Linux kernel's Freescale MXC MMC driver. The mxcmmc driver fails to check the return value of mmc_add_host(). If this function fails, memory allocated by mmc_alloc_host() is leaked, and a subsequent driver removal will crash the kernel when attempting to delete a device that was never successfully added.
Statement
This flaw affects embedded systems with Freescale i.MX SoCs using the mxcmmc driver. The issue only manifests when mmc_add_host() fails during driver initialization, which is an uncommon error condition. The memory leak and crash require both specific hardware and an initialization failure to trigger.
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 Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 3.3 | N/A | N/A |
| Attack Vector | Local | N/A | N/A |
| Attack Complexity | Low | N/A | N/A |
| Privileges Required | Low | N/A | N/A |
| User Interaction | None | N/A | N/A |
| Scope | Unchanged | N/A | N/A |
| Confidentiality | None | N/A | N/A |
| Integrity Impact | None | N/A | N/A |
| Availability Impact | Low | N/A | N/A |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Understanding the Weakness (CWE)
Availability,Integrity
Technical Impact: Unexpected State; DoS: Crash, Exit, or Restart
An unexpected return value could place the system in a state that could lead to a crash or other unintended behaviors.
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