Security readout for executives and security teams
Plain-English summary
CVE-2021-30338 affects Qualcomm Snapdragon Compute platforms. A flaw in a TrustZone memory transfer interface can expose sensitive information. The issue is local, not remotely reachable based on the CVSS vector, but it crosses a protected trust boundary and has high confidentiality impact.
Executive priority
Treat this as a high-priority confidentiality issue for affected Snapdragon Compute assets. It is not evidenced as internet-exploited, but TrustZone boundary exposure can affect sensitive workloads and should be remediated through OEM-supported firmware updates.
Technical view
The vulnerability is improper input validation in the TrustZone memory transfer interface for Snapdragon Compute SD850 and SDXR1. CVSS 3.1 is 7.1: local attack vector, low complexity, no privileges, no user interaction, changed scope, high confidentiality impact, and no integrity or availability impact.
Likely exposure
Exposure is limited to systems or embedded products using Qualcomm Snapdragon Compute SD850 or SDXR1. Organizations should validate exposure through hardware inventories, OEM device models, firmware baselines, and vendor security bulletin mapping.
Exploitation context
The source bundle does not cite active exploitation, and the CVE is not marked CISA KEV. The local attack vector means exploitation requires local access to an affected device or local execution context, based on the CVSS data.
Researcher notes
Evidence is concise and vendor-centered. The public description identifies the vulnerable TrustZone memory transfer interface and affected chips, but does not provide detailed root cause, exploit maturity, or fixed firmware identifiers in the supplied bundle.
Mitigation direction
- Review Qualcomm's April 2022 security bulletin and affected platform notes.
- Obtain OEM firmware or security updates that incorporate Qualcomm's guidance.
- Prioritize updates on shared, high-value, or sensitive Snapdragon Compute devices.
- If updates are unavailable, restrict local access and harden endpoint controls.
- Track OEM advisory status until a confirmed remediation path exists.
Validation and detection
- Inventory devices using Snapdragon Compute SD850 or SDXR1.
- Confirm firmware level against Qualcomm's April 2022 bulletin.
- Map OEM device models to Qualcomm affected platform identifiers.
- Review endpoint telemetry for unusual local access to protected-device interfaces.
- Document systems where vendor remediation is unavailable or unconfirmed.
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-2021-30338 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
- 7.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/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:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N2.54Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.1HighVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.qualcomm.com/company/product-security/bulletins/april-2022-bulletinCVE 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.