Security readout for executives and security teams
Plain-English summary
CVE-2018-9484 is an Android information-disclosure flaw. A remote attacker could trigger an out-of-bounds read without user interaction or privileges, potentially exposing sensitive memory data. The provided sources identify affected Android 7, 8, 8.1, 9, and listed development branches.
Executive priority
Treat this as high priority for legacy Android fleets. It affects confidentiality and requires no user action, but current exploitation evidence was not provided. Focus on patch verification and unsupported-device reduction.
Technical view
The flaw is a CWE-125 out-of-bounds read in l2cu_send_peer_config_rej in l2c_utils.cc, caused by a missing bounds check. CVSS 3.1 is 7.5: network, low complexity, no privileges, no user interaction, unchanged scope, high confidentiality impact only.
Likely exposure
Exposure is most likely on older or unpatched Android devices running affected Android 7, 8, 8.1, or 9 builds. Device-specific exposure depends on OEM backports and installed Android security patch levels.
Exploitation context
The supplied bundle does not show KEV status or any cited evidence of active exploitation. Risk is still meaningful because the CVSS vector indicates remote reachability, low attack complexity, and no required user interaction.
Researcher notes
The evidence points to a bounds-check failure in Android l2c_utils.cc leading to remote information disclosure. The bundle does not provide exploit details, proof-of-concept status, or device-specific patch mappings, so validation should stay tied to vendor bulletins and build metadata.
Mitigation direction
- Check Google and device-vendor guidance for CVE-2018-9484 updates.
- Update affected Android devices to vendor-supported patched builds.
- Retire or isolate devices that cannot receive security updates.
- Prioritize managed fleets still running Android 7 through 9.
Validation and detection
- Inventory Android versions and security patch levels across managed devices.
- Compare device builds against the September 2018 Android security bulletin.
- Confirm OEM firmware includes the relevant Android security fixes.
- Track unsupported devices as residual exposure until replaced or isolated.
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
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CWE-125: Exact CWE lookup
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Open ATT&CK lookupCVE-2018-9484 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
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:N/S:U/C:H/I:N/A:N3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://source.android.com/security/bulletin/2018-09-01CVE 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.