Security readout for executives and security teams
Plain-English summary
CVE-2018-9366 is a high-severity Android issue in IMS/video telephony components. A local attacker with low privileges could trigger memory corruption and potentially gain higher privileges. The source says no user interaction is required. Business risk is highest for Android fleets that still run affected vendor security levels or unsupported OEM builds.
Executive priority
Treat as a high-priority legacy Android patching issue. It is not documented as actively exploited in the provided sources, but successful exploitation could elevate local privileges and affect sensitive data, device integrity, and availability.
Technical view
The CVE describes an out-of-bounds write caused by integer overflow in IMSA_Recv_Thread and VT_IMCB_Thread in ImsaClient.cpp and VideoTelephony.c. CVSS 3.1 is 7.8 with local attack vector, low complexity, low privileges required, no user interaction, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure appears limited to Android devices or SoC builds containing the affected IMSA and video telephony code identified as SoCVersion. The bundle does not provide specific device models, chipsets, or OEM version ranges.
Exploitation context
The bundle states local escalation of privilege, no additional execution privileges needed, and no user interaction required. It does not cite active exploitation, and KEV status is false, so active exploitation should not be assumed.
Researcher notes
Affected-scope evidence is incomplete: the bundle names Android and SoCVersion but not exact device models or vendor branches. Root cause, impacted threads, file names, privilege requirement, and CVSS impacts are clearly stated.
Mitigation direction
- Apply the Android June 2018 security bulletin fixes or later applicable OEM updates.
- Check OEM or SoC vendor guidance for exact affected device and build coverage.
- Prioritize unsupported Android devices for replacement or isolation.
- Enforce mobile device management patch compliance for Android security patch levels.
Validation and detection
- Inventory Android devices and record OEM, model, SoC, and security patch level.
- Confirm whether devices include the affected IMSA or video telephony components.
- Compare fleet patch levels against the June 2018 Android bulletin guidance.
- Review vulnerability scanner results for CVE-2018-9366 without relying on exploit checks.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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Open ATT&CK lookupCVE-2018-9366 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 7.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H1.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://source.android.com/security/bulletin/2018-06-01CVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Out-of-bounds Write
Out-of-bounds Write represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.