Security readout for executives and security teams
Plain-English summary
A flaw in Qualcomm Snapdragon hypervisor address-mapping updates could cause memory corruption in a highly privileged layer. That layer helps isolate system components, so impact could include data exposure, system compromise, or outages. Business exposure depends on whether devices, vehicles, modules, or IoT products use the listed Qualcomm parts and whether vendor firmware updates were applied.
Executive priority
Prioritize discovery and vendor update verification for affected Qualcomm-based assets. The issue is critical, but urgency should be driven by confirmed exposure, device criticality, and availability of OEM firmware fixes.
Technical view
CVE-2021-35090 is a TOC/TOU race condition during address mapping updates in Qualcomm Snapdragon platforms. The CVSS 3.1 vector is 9.3 critical: local attack vector, low complexity, no privileges, no user interaction, changed scope, and high confidentiality, integrity, and availability impact.
Likely exposure
Most likely exposure is through OEM devices or embedded products using listed Snapdragon Auto, Compute, Connectivity, Industrial IoT, or Mobile components. The bundle does not identify specific device models, operating systems, or firmware versions, so asset mapping to Qualcomm part numbers is required.
Exploitation context
The source bundle does not show CISA KEV listing or cite active exploitation. Treat this as high-impact because the affected layer is the hypervisor and the CVSS score is critical, but do not assume exploitation is occurring without additional evidence.
Researcher notes
Key unknowns are affected firmware revisions, OEM patch propagation, and practical exploitability on specific devices. The public bundle identifies broad Qualcomm product families and part numbers but does not provide exploit details, proof of concept, or device-level impact evidence.
Mitigation direction
- Review Qualcomm's May 2022 bulletin and relevant OEM advisories for fixed firmware guidance.
- Prioritize updates for devices using the listed Qualcomm chipsets or modules.
- Ask suppliers to confirm affected component use and remediation status.
- Track unsupported devices as exceptions requiring compensating controls or replacement planning.
Validation and detection
- Inventory devices, modules, vehicles, and IoT assets using listed Qualcomm parts.
- Map OEM firmware versions against Qualcomm and device-vendor security bulletins.
- Confirm update deployment through MDM, fleet management, or supplier attestation records.
- Document assets where chipset identity or firmware 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.
CVE-2021-35090 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
- Critical
- CVSS
- 9.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/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:N/UI:N/S:C/C:H/I:H/A:H2.56Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.3CriticalVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.qualcomm.com/company/product-security/bulletins/may-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.