Security readout for executives and security teams
Plain-English summary
CVE-2023-20618 is a MediaTek vcu flaw that may corrupt memory because locking is handled incorrectly. The vendor says it can allow local privilege escalation without user interaction, but exploitation requires high privileges. Business urgency is highest for fleets with affected MediaTek Android devices that have not received OEM security updates.
Executive priority
Treat this as a moderate fleet hygiene issue. It is not evidenced as actively exploited, but unpatched affected Android devices could deepen the impact of a local compromise.
Technical view
The issue is CWE-667 improper locking in MediaTek vcu, affecting listed MT67xx, MT68xx, MT81xx, and MT87xx chipsets on Android 11, 12, and 13. CVSS 3.1 is 6.7 with local attack vector, low complexity, high privileges required, no user interaction, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is limited to devices using the listed MediaTek chipsets and Android 11.0, 12.0, or 13.0. The main practical risk is unmanaged or slow-to-update Android fleets where OEM firmware updates lag behind MediaTek's February 2023 bulletin.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. Exploitation is local and requires high privileges, but no user interaction. That lowers broad remote risk while preserving concern for chained attacks or already-compromised devices.
Researcher notes
Evidence is limited to the CVE record and MediaTek bulletin metadata. The sources identify the component, affected chipsets, Android versions, CVSS vector, CWE-667, and patch ID, but do not provide public root-cause detail or exploit status.
Mitigation direction
- Inventory Android devices for the listed MediaTek chipsets and OS versions.
- Apply OEM firmware updates that include MediaTek February 2023 fixes or Patch ID ALPS07519184.
- Check device-maker guidance when patch availability is unclear.
- Prioritize updates for managed devices with sensitive data or privileged apps.
- Replace or segregate devices that cannot receive relevant OEM updates.
Validation and detection
- Confirm device chipset model against MediaTek's affected product list.
- Verify Android version is not an affected unpatched 11.0, 12.0, or 13.0 build.
- Review OEM security patch notes for ALPS07519184 or February 2023 MediaTek fixes.
- Check MDM or fleet telemetry for remaining vulnerable device populations.
- Document exceptions where OEM patch status cannot be confirmed.
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-667: 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-2023-20618 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
- 6.7 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:H/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:H/UI:N/S:U/C:H/I:H/A:H0.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.7MediumVector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://corp.mediatek.com/product-security-bulletin/February-2023CVE 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.
Improper Locking
Improper Locking represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.