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CVE Record

CVE-2018-5893: While processing a message from firmware in htt_t2h_msg_handler_fast() in Android releases from CAF using t...

While processing a message from firmware in htt_t2h_msg_handler_fast() in Android releases from CAF using the linux kernel (Android for MSM, Firefox OS for MSM, QRD Android) before security patch level 2018-06-05, a buffer overwrite can occur.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2018-5893 is a Qualcomm CAF Android kernel issue where processing a firmware message can overwrite a buffer. The bundle identifies affected Android for MSM, Firefox OS for MSM, and QRD Android releases before the 2018-06-05 security patch level. Business urgency depends on whether legacy Qualcomm-based Android builds remain deployed.

Executive priority

Treat this as a legacy-platform verification item, not an emergency based on current evidence. Prioritize environments with old Qualcomm Android builds or unmanaged embedded devices, because unsupported systems may remain permanently exposed.

Technical view

The vulnerability is in htt_t2h_msg_handler_fast() while handling firmware-to-host messages in CAF Android Linux kernel releases. The public description states a buffer overwrite can occur before security patch level 2018-06-05. No CVSS score, CWE, exploit prerequisites, or impact details are provided in the bundle.

Likely exposure

Exposure is most likely in legacy Qualcomm CAF-based Android builds, especially Android for MSM, Firefox OS for MSM, or QRD Android before 2018-06-05. Modern, vendor-supported devices patched after that level are less likely exposed, but validation requires device and source confirmation.

Exploitation context

The provided sources do not show active exploitation, and the CVE is not listed as KEV in the bundle. The evidence only supports a buffer overwrite condition during firmware message processing, with no public exploitation details or weaponized context included.

Researcher notes

The bundle lacks severity scoring, CWE mapping, and exploitability detail. Analysis should stay tied to patch-level and source-code validation. Avoid extrapolating impact beyond the documented buffer overwrite in the Qualcomm CAF Android Linux kernel WLAN path.

Mitigation direction

  • Confirm devices run Android security patch level 2018-06-05 or later.
  • Apply OEM or platform updates containing the Qualcomm component fix.
  • Retire unsupported Qualcomm CAF-based Android builds that cannot receive security updates.
  • Check vendor guidance before assuming a workaround exists.

Validation and detection

  • Inventory Qualcomm-based Android, MSM, QRD, and Firefox OS for MSM devices.
  • Record each device firmware and Android security patch level.
  • Compare qcacld-3.0 source against the referenced CodeAurora commit.
  • Review whether htt_t2h_msg_handler_fast() includes the vendor fix.
  • Document unsupported devices as residual risk.
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-2018-5893 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
4Source 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.