Security readout for executives and security teams
Plain-English summary
CVE-2018-21085 affects Samsung mobile devices running Android Lollipop 5.x, Marshmallow 6.0, and Nougat 7.x software. The issue is a race condition that can lead to use-after-free memory corruption. The public record does not provide severity, business impact, or exploitation details.
Executive priority
Treat this as an inventory and legacy-device hygiene issue. Urgency rises if the organization still allows old Samsung Android 5.x to 7.x devices to access corporate data and they cannot be updated.
Technical view
The vulnerability is described as a race condition with resultant use-after-free in vnswap_deinit_backing_storage. Samsung tracks it as SVE-2017-11176 in its February 2018 security materials. The source bundle provides no CVSS, CWE, CPEs, privilege requirements, or confirmed attack vector.
Likely exposure
Exposure is most likely on older Samsung mobile devices still running Android 5.x, 6.0, or 7.x software without the relevant Samsung security update. Newer or fully updated devices are not identified as affected in the provided sources.
Exploitation context
The source bundle does not show CISA KEV listing or any cited evidence of active exploitation. The vulnerability class can be serious, but the available public data does not establish exploitability, required access, or observed attacks.
Researcher notes
Evidence is sparse. The record names the vulnerable function and bug class but omits CVSS, CPEs, CWE, exploit prerequisites, patch identifiers, and proof of exploitation. Do not infer affected non-Samsung products or exploitation status from the current sources.
Mitigation direction
- Inventory Samsung devices running Android 5.x, 6.0, or 7.x.
- Check Samsung guidance for SVE-2017-11176 and CVE-2018-21085.
- Apply relevant Samsung security updates where vendor support exists.
- Retire or isolate unsupported devices that cannot receive updates.
- Limit sensitive access from outdated mobile devices.
Validation and detection
- Confirm device model, Android version, and security patch level.
- Map affected devices to Samsung February 2018 security guidance.
- Verify whether each device can still receive vendor updates.
- Document unsupported devices and compensating controls.
- Monitor vendor and vulnerability records for added severity details.
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-2018-21085 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.