Security readout for executives and security teams
Plain-English summary
CVE-2018-9351 is an Android media-processing flaw that can crash affected devices or services after user interaction. The public record describes availability impact, not data theft or code execution. Business urgency is mainly for fleets still running Android 7.x or 8.x builds without the relevant 2018 security update path.
Executive priority
Treat this as a moderate legacy Android fleet risk. It is not evidenced as exploited or code-executing, but it can disrupt affected devices. Priority should focus on inventory accuracy, patch-level confirmation, and removal of unsupported Android 7.x or 8.x devices from sensitive workflows.
Technical view
The flaw is an out-of-bounds read in ih264e_fmt_conv_420p_to_420sp in ih264e_fmt_conv.c, caused by missing bounds checking. It is classified as CWE-125. CVSS 3.1 is 6.5: network-reachable, low complexity, no privileges, user interaction required, unchanged scope, and high availability impact only.
Likely exposure
Exposure is most plausible on Android 7, 7.1.1, 7.1.2, 8, and 8.1 systems that can process attacker-supplied media or content reaching the affected H.264 conversion path. Modern, patched, or unsupported-device status is not established by the source bundle and must be verified per device build.
Exploitation context
The source bundle does not show CISA KEV listing or public active exploitation evidence. Exploitation is described as remote denial of service with no additional privileges, but it requires user interaction. No source in the bundle supports confidentiality impact, integrity impact, or code execution.
Researcher notes
Evidence is limited to the CVE record and Android bulletin reference. The affected function points to Android H.264 encoding/conversion code, with missing bounds checking causing an out-of-bounds read. Do not assume exploitability beyond denial of service without additional vendor or researcher evidence.
Mitigation direction
- Identify Android 7.x and 8.x devices in managed inventory.
- Check Google Pixel June 2018 bulletin guidance and OEM security bulletins.
- Apply available vendor security updates for affected device builds.
- Retire or restrict devices without a supported update path.
- Reduce exposure to untrusted media handling where updates are unavailable.
Validation and detection
- Confirm each device Android version and security patch level.
- Compare device builds against Google or OEM June 2018 security guidance.
- Review MDM inventory for remaining Android 7.x and 8.x assets.
- Validate media-facing apps and workflows on unpatched devices.
- Track unsupported devices as residual denial-of-service risk.
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
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.
CWE-125: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2018-9351 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/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:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H2.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://source.android.com/docs/security/bulletin/pixel/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 Read
Out-of-bounds Read represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.