Security readout for executives and security teams
Plain-English summary
CVE-2021-30337 is a high-severity Qualcomm Snapdragon memory-safety flaw. A local, unprivileged attacker could potentially trigger use-after-free behavior during process initialization, affecting confidentiality, integrity, and availability. The sources do not show confirmed active exploitation.
Executive priority
Treat this as a high-priority firmware and asset-management issue, especially for managed device fleets and embedded infrastructure. Business urgency depends on whether affected Snapdragon chipsets are present and whether OEM updates are available.
Technical view
The issue is CWE-416 use-after-free. Qualcomm describes process shell memory being freed through an IOCTL call while process initialization is still in progress. CVSS 3.1 is 8.4 with local attack vector, low complexity, no privileges, no user interaction, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is likely in products using affected Qualcomm Snapdragon Auto, Compute, Connectivity, Consumer IoT, Industrial IoT, Mobile, Voice and Music, Wearables, and Wired Infrastructure and Networking chipsets. The affected chipset list is broad and partially truncated in the provided bundle, so asset matching may require vendor or OEM confirmation.
Exploitation context
The CVSS vector indicates local exploitation, low complexity, no privileges, and no user interaction. The bundle marks CISA KEV as false and provides no cited evidence of active exploitation or public weaponization.
Researcher notes
Evidence supports a local use-after-free with severe impact potential, but the provided sources do not include exploit details, patch identifiers, or complete affected-version data. Validate through official Qualcomm and OEM advisories rather than assuming product-specific exposure.
Mitigation direction
- Check Qualcomm’s December 2021 security bulletin for vendor guidance.
- Obtain firmware or security updates from the device OEM or platform vendor.
- Prioritize updates for exposed shared, mobile, IoT, networking, and fleet-managed devices.
- Restrict local access to affected devices where patching is delayed.
Validation and detection
- Inventory devices and embedded platforms using Qualcomm Snapdragon components.
- Map detected chipsets against Qualcomm’s affected product and chipset list.
- Confirm OEM firmware versions include Qualcomm’s relevant December 2021 fixes or guidance.
- Review local access paths that could reach affected IOCTL handling.
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-416: 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-2021-30337 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
- 8.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/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:N/UI:N/S:U/C:H/I:H/A:H2.55.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.4HighVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.qualcomm.com/company/product-security/bulletins/december-2021-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.
Use After Free
Use After Free represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.