Security readout for executives and security teams
Plain-English summary
CVE-2018-21076 is an information disclosure issue in Samsung mobile software for Android N 7.x devices using Exynos8890/8895 chipsets. It can expose a KASLR offset from the Secure Driver through a modified trustlet, weakening a protection that makes kernel attacks harder. Public sources do not provide a CVSS score or active exploitation evidence.
Executive priority
Treat this as a legacy mobile risk review, not an emergency, unless affected Samsung Android 7.x Exynos devices still access sensitive systems. The main business concern is defense weakening that could support chained attacks on obsolete mobile endpoints.
Technical view
The CVE describes disclosure of a kernel address layout randomization offset in Samsung's Secure Driver via a modified trustlet. The record maps to Samsung SVE-2017-10987 from April 2018 and names Samsung mobile devices with N 7.x software on Exynos8890/8895 chipsets. No CWE, CVSS vector, detailed model list, or exploit status is provided.
Likely exposure
Exposure appears limited to older Samsung mobile devices running Android N 7.x software on Exynos8890 or Exynos8895 chipsets. The source bundle does not identify exact commercial models or all firmware builds, so asset validation should use Samsung security bulletin data and device inventory.
Exploitation context
The CVE is not listed as KEV in the provided bundle, and no cited source reports active exploitation. The disclosed data is a KASLR offset, which is typically more useful when chained with other vulnerabilities than as a standalone business-impacting flaw.
Researcher notes
Evidence is sparse. The key technical claim is KASLR offset disclosure in the Secure Driver through a modified trustlet. Public records do not provide CVSS, CWE, model mapping, full patch details, or exploitation confirmation, so conclusions should remain constrained to the Samsung and CVE records.
Mitigation direction
- Check Samsung guidance for SVE-2017-10987 and affected firmware status.
- Update affected devices to vendor-supported firmware where available.
- Retire or restrict unsupported Android 7.x Samsung devices from sensitive workflows.
- Use MDM controls to enforce minimum OS and security patch levels.
Validation and detection
- Inventory Samsung mobile devices by model, chipset, Android version, and patch level.
- Identify devices running Android N 7.x on Exynos8890 or Exynos8895 chipsets.
- Compare device patch status with Samsung's April 2018 security update guidance.
- Confirm unsupported affected devices are isolated, replaced, or blocked from privileged access.
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.
CVE-2018-21076 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://security.samsungmobile.com/securityUpdate.smsbCVE reference · x_refsource_CONFIRM
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.