LiveActive security incident?Get immediate response
CVE Record

CVE-2022-50769: mmc: mxcmmc: fix return value check of mmc_add_host()

In the Linux kernel, the following vulnerability has been resolved: mmc: mxcmmc: fix return value check of mmc_add_host() mmc_add_host() may return error, if we ignore its return value, the memory that allocated in mmc_alloc_host() will be leaked and it will lead a kernel crash because of deleting not added device in the remove path. So fix this by checking the return value and goto error path which will call mmc_free_host().

UnknownCVSS not scoredNot KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2022-50769 is a Linux kernel defect in the mxcmmc memory-card host driver. If adding the host fails, the driver may leak memory and later crash the kernel during device removal. Business impact is mainly availability risk on systems using this driver, especially embedded or hardware-specific Linux deployments.

Executive priority

Handle through normal kernel maintenance unless affected systems are safety-critical or highly available embedded devices. Prioritize validation where Linux devices use MMC storage and cannot tolerate kernel crashes.

Technical view

The mxcmmc driver ignored the return value from mmc_add_host(). On failure, memory allocated by mmc_alloc_host() was not freed, and the remove path could try to delete a device that was never added, causing a kernel crash. Stable kernel commits add error handling that frees the host through the error path.

Likely exposure

Exposure appears limited to Linux systems using the mxcmmc MMC host controller driver. The CVE record lists Linux kernel versions and stable branch fixes, but exact exposure depends on kernel configuration, hardware, and downstream vendor backports.

Exploitation context

No active exploitation is indicated in the provided sources, and the CVE is not listed as KEV. The described impact is a kernel crash under driver error conditions, not confirmed remote code execution or privilege escalation.

Researcher notes

Severity, CVSS, and CWE are not provided in the source bundle. The issue is a missed error check in a hardware-specific kernel driver. Avoid assuming broad internet exposure; assess by kernel branch, device tree or hardware use, and vendor backport status.

Mitigation direction

  • Update to a Linux kernel containing the referenced stable fixes.
  • Check distribution or device vendor advisories for backported kernel fixes.
  • Prioritize embedded Linux systems using mxcmmc-compatible MMC hardware.
  • If patch status is unclear, request vendor confirmation for CVE-2022-50769.

Validation and detection

  • Inventory Linux kernel versions on systems with MMC hardware.
  • Confirm whether the mxcmmc driver is built or loaded.
  • Verify the relevant stable fix commit is present or backported.
  • Review kernel logs for mxcmmc probe or removal failures and crashes.
Prepared
Confidence
medium
Sources
11

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cve · low confidence lookup

CVE-2022-50769 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
10Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxd96be879ff469759af6d7fcebdb66237c18da6f8, d96be879ff469759af6d7fcebdb66237c18da6f8, d96be879ff469759af6d7fcebdb66237c18da6f8, d96be879ff469759af6d7fcebdb66237c18da6f8, d96be879ff469759af6d7fcebdb66237c18da6f8, d96be879ff469759af6d7fcebdb66237c18da6f8, d96be879ff469759af6d7fcebdb66237c18da6f8, d96be879ff469759af6d7fcebdb66237c18da6f8, d96be879ff469759af6d7fcebdb66237c18da6f8unaffected
LinuxLinux2.6.29, 0, 4.9.337, 4.14.303, 4.19.270, 5.4.229, 5.10.163, 5.15.86, 6.0.16, 6.1.2, 6.2affected
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.