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CVE Record

CVE-2022-48718: drm: mxsfb: Fix NULL pointer dereference

In the Linux kernel, the following vulnerability has been resolved: drm: mxsfb: Fix NULL pointer dereference mxsfb should not ever dereference the NULL pointer which drm_atomic_get_new_bridge_state is allowed to return. Assume a fixed format instead.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2022-48718 is a Linux kernel bug in the mxsfb display driver. The driver could dereference a NULL pointer, which can crash affected systems. Business urgency is highest for embedded or appliance systems using this display hardware. The public record does not show active exploitation or a CVSS score.

Executive priority

Treat as a targeted availability risk for affected embedded Linux estates, not a broad enterprise emergency. Prioritize remediation where device crashes affect operations, safety, customer service, or physical infrastructure.

Technical view

The issue is in Linux DRM mxsfb handling of bridge state. drm_atomic_get_new_bridge_state may return NULL, and mxsfb could dereference it. The kernel fix avoids that dereference and assumes a fixed format. Affected version information indicates Linux 5.15 and later stable lines, with fixes referenced in stable commits.

Likely exposure

Exposure is likely limited to Linux systems using the mxsfb DRM display driver, commonly relevant to certain embedded platforms. General-purpose servers without this driver or hardware are less likely exposed. Version data in the source is limited and should be confirmed against vendor kernels.

Exploitation context

Sources describe a NULL pointer dereference, suggesting availability impact such as a kernel crash. They do not describe remote exploitation, privilege escalation, public exploit availability, or active exploitation. CISA KEV status is false in the provided data.

Researcher notes

The record lacks CVSS, CWE, detailed trigger conditions, and exploitability analysis. Avoid assuming network reachability or privilege requirements. Validate using kernel configuration, hardware presence, and commit ancestry rather than package version alone.

Mitigation direction

  • Apply vendor kernel updates that include the referenced stable Linux fixes.
  • Prioritize embedded Linux devices using mxsfb display hardware.
  • If no vendor package exists, consult the device or distribution maintainer.
  • Track kernel lineage against the listed stable commits.

Validation and detection

  • Inventory Linux assets and identify mxsfb driver usage.
  • Check running kernel versions against vendor advisories.
  • Confirm whether the stable fix commits are present.
  • Review embedded device BSPs for backported fixes.
Prepared
Confidence
medium
Sources
5

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

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CVE-2022-48718 mapping review

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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
3Timeline events
2ADP providers
4Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc
CVECVE Program Container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxb776b0f00f246d093c595bac4453c6e51541d5c5, b776b0f00f246d093c595bac4453c6e51541d5c5, b776b0f00f246d093c595bac4453c6e51541d5c5unaffected
LinuxLinux5.15, 0, 5.15.27, 5.16.8, 5.17affected
Weakness

CWE details

No CWE listed

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