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CVE Record

CVE-2018-5840: Buffer Copy without Checking Size of Input can occur during the DRM SDE driver initialization sequence in a...

Buffer Copy without Checking Size of Input can occur during the DRM SDE driver initialization sequence in all Android releases from CAF (Android for MSM, Firefox OS for MSM, QRD Android) using the Linux Kernel.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2018-5840 is a kernel-level buffer copy issue in Qualcomm CAF Android-based releases during DRM SDE driver initialization. The public data does not provide severity, CVSS, or confirmed exploitation. Treat it as potentially important for affected device firmware because kernel memory bugs can affect system stability and security boundaries.

Executive priority

Set priority after confirming affected Qualcomm CAF lineage in your fleet. If present on supported devices, include it in normal firmware security update cycles. Escalate only if vendor guidance or internal analysis shows reachable attack paths or high-value exposed assets.

Technical view

The issue is described as buffer copy without checking input size in the DRM SDE driver initialization sequence. Affected software is all Android releases from CAF using the Linux kernel for Android for MSM, Firefox OS for MSM, and QRD Android. Public sources do not provide attack vector, privileges required, patch commit, or CVSS.

Likely exposure

Exposure is most likely in products or firmware derived from Qualcomm CAF Android for MSM, Firefox OS for MSM, or QRD Android Linux kernel releases that include the DRM SDE driver. The bundle does not identify specific device models, OEMs, or Android patch levels.

Exploitation context

The source bundle does not show CISA KEV listing or any cited report of active exploitation. It also does not state whether exploitation is local, remote, physical, or requires special privileges. Any exploitation assessment beyond the buffer-copy condition would be unsupported by the provided evidence.

Researcher notes

Evidence is limited. The bundle provides vulnerability class, initialization location, affected CAF release families, publication dates, and one Code Aurora bulletin reference. It lacks CVSS, CWE mapping, patch identifiers, attack preconditions, vulnerable code links, fixed versions, and exploitation claims.

Mitigation direction

  • Inventory firmware built from affected CAF Android Linux kernel releases.
  • Check Qualcomm, Code Aurora, and OEM bulletins for the vendor-approved fix.
  • Apply relevant OEM firmware or kernel security updates when available.
  • Prioritize devices using the DRM SDE display driver.
  • Track compensating guidance from the device vendor if updates are unavailable.

Validation and detection

  • Confirm whether builds derive from CAF Android for MSM, Firefox OS for MSM, or QRD Android.
  • Review kernel manifests for the Qualcomm DRM SDE driver.
  • Compare firmware security bulletin coverage against the May 2018 Code Aurora bulletin.
  • Verify OEM images include the vendor-supplied remediation before deployment.
Prepared
Confidence
medium
Sources
3

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-2018-5840 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
0Timeline events
0ADP providers
2Source 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
Qualcomm, Inc.Android for MSM, Firefox OS for MSM, QRD AndroidAll Android releases from CAF using the Linux kernelListed
Weakness

CWE details

No CWE listed

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