Security readout for executives and security teams
Plain-English summary
CVE-2021-30347 is a critical Qualcomm Snapdragon issue in several automotive, compute, connectivity, industrial IoT, and mobile chipsets. The reported flaw involves an improper integrity check that can trigger a race condition after a valid RRC command packet. Business risk is highest where affected Qualcomm-based devices depend on timely vendor firmware updates.
Executive priority
Treat as high-priority firmware exposure management, not a routine application patch. The issue is critical by CVSS and affects broad Qualcomm-based device classes, but current provided evidence does not prove active exploitation. Focus on inventory, OEM update availability, and exception handling for unmanaged or unsupported devices.
Technical view
The CVE describes an improper integrity check causing a race condition between PDCP and RRC tasks after receipt of a valid RRC Command packet. CVSS 3.1 is 9.1 with network attack vector, low complexity, no privileges, no user interaction, high confidentiality and integrity impact, and no availability impact.
Likely exposure
Exposure depends on whether deployed devices contain one of the listed Qualcomm chipsets and whether the downstream OEM has shipped and installed relevant firmware or security updates. The affected list is broad across Snapdragon Auto, Compute, Connectivity, Industrial IoT, and Mobile product families.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. The CVSS vector indicates remotely reachable attack surface with no privileges or user interaction, but the bundle does not provide exploit details, public exploitation evidence, or operational prerequisites beyond the RRC/PDCP context.
Researcher notes
The source bundle provides limited root-cause detail and no CWE. Avoid assuming exact exploitability across all listed chipsets without OEM implementation context. Validation should focus on chipset identification, firmware lineage, and vendor bulletin correlation. No exploit steps or public proof-of-concept are cited in the provided sources.
Mitigation direction
- Inventory devices using the listed Qualcomm chipset models.
- Review Qualcomm's April 2022 bulletin and downstream OEM advisories.
- Apply OEM firmware or security updates when confirmed applicable.
- Prioritize managed mobile, IoT, automotive, and connectivity devices.
- Track vendor guidance where patch status is unclear.
Validation and detection
- Map hardware models to the affected Qualcomm chipset list.
- Confirm firmware or security patch level with each OEM.
- Check MDM, EDR, or asset inventory for vulnerable device families.
- Document unsupported devices that cannot receive firmware updates.
- Monitor Qualcomm, OEM, and CISA KEV updates for status changes.
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-2021-30347 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
- 9.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N3.95.2Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.1CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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.