Security readout for executives and security teams
Plain-English summary
CVE-2018-9399 is an Android kernel issue in the /proc/driver/wmt_dbg driver. A local attacker could exploit out-of-bounds writes to gain higher privileges. It is not described as remotely exploitable, and no active exploitation is cited in the provided sources.
Executive priority
Treat this as a high-priority legacy Android kernel exposure where vulnerable devices remain in service. Business urgency depends on fleet age, patch levels, and whether untrusted apps can run locally.
Technical view
The CVE describes several possible out-of-bounds writes in /proc/driver/wmt_dbg, classified as CWE-787. CVSS 3.1 is 7.8: 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 kernel builds containing the vulnerable /proc/driver/wmt_dbg driver. The supplied affected data names Google Android Kernel but does not enumerate exact device models, kernel versions, or downstream OEM status.
Exploitation context
The CVSS vector indicates exploitation requires local access and some privileges, with no user interaction. The sources do not show CISA KEV listing or other evidence of active exploitation. Successful exploitation could elevate privileges to System-level execution.
Researcher notes
Evidence is narrow: the CVE states the vulnerable driver path, bug class, privilege impact, and CVSS vector. It does not provide exploit details, exact fixed versions, or OEM-specific exposure. Avoid assuming affected devices beyond sourced Android kernel context.
Mitigation direction
- Review the Pixel June 2018 security bulletin for vendor guidance.
- Apply applicable Android, Pixel, OEM, or kernel security updates.
- Prioritize devices with untrusted local app execution risk.
- Restrict deployment of outdated Android kernel images where feasible.
- Monitor vendor advisories for exact affected build details.
Validation and detection
- Inventory Android devices and kernel build levels.
- Check whether /proc/driver/wmt_dbg exists on managed devices.
- Confirm devices received the relevant June 2018 Pixel or OEM fixes.
- Review EDR or MDM telemetry for abnormal local privilege escalation indicators.
- Document unknown OEM exposure where vendor data is unavailable.
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-787: 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-2018-9399 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
- 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/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 Write
Out-of-bounds Write represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.