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CVE Record

CVE-2021-30334: Possible use after free due to lack of null check of DRM file status after file structure is freed in Snapd...

Possible use after free due to lack of null check of DRM file status after file structure is freed in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Voice & Music, Snapdragon Wearables

HighCVSS 8.4Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

CVE-2021-30334 is a high-severity memory safety flaw in Qualcomm Snapdragon platforms. A local attacker could potentially affect confidentiality, integrity, and availability on vulnerable devices. Business risk depends on whether products, fleets, or embedded systems use the listed Qualcomm chipsets and whether firmware includes Qualcomm’s April 2022 security fixes.

Executive priority

Treat as a high-priority firmware exposure review, especially for embedded, automotive, IoT, and managed mobile-adjacent fleets. Urgency is driven by asset prevalence and update availability, not confirmed active exploitation in the supplied sources.

Technical view

The issue is described as a possible use-after-free caused by missing null checking of DRM file status after a file structure is freed. CVSS 3.1 is 8.4 with local attack vector, low complexity, no privileges, no user interaction, unchanged scope, and high C/I/A impact.

Likely exposure

Exposure is most likely in devices using the listed Qualcomm Snapdragon Auto, Compute, Connectivity, Consumer IoT, Industrial IoT, Voice & Music, or Wearables components. Confirmation requires mapping device hardware and firmware to Qualcomm and OEM advisories.

Exploitation context

The provided bundle marks KEV as false and gives no cited evidence of active exploitation. The CVSS vector indicates exploitation requires local access but no privileges or user interaction. Do not assume internet-remote exploitability from these sources.

Researcher notes

Sources do not provide CWE, exploit details, proof of concept, or fixed build identifiers. Analysis should stay centered on Qualcomm/OEM firmware status and affected chipset matching. Validate assumptions with vendor bulletins before declaring systems affected or remediated.

Mitigation direction

  • Check Qualcomm’s April 2022 bulletin for vendor guidance.
  • Request fixed firmware status from device OEMs.
  • Prioritize updates for managed Snapdragon-based devices.
  • Track unsupported devices as residual risk.
  • Avoid inventing compensating controls without product-specific guidance.

Validation and detection

  • Inventory devices using affected Qualcomm chipsets.
  • Compare firmware builds against OEM security advisories.
  • Confirm whether April 2022 Qualcomm fixes are included.
  • Review asset classes: auto, IoT, wearable, compute, connectivity.
  • Document devices with no available firmware path.
Prepared
Confidence
medium
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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.

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CVE-2021-30334 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
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

Official CVE source material

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.

1CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS vector scores

1 official score

We 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.

ScoreVersionSeverityVectorExploitImpactSource
8.4CVSS 3.1HighCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H2.55.9Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

8.4High
CVSS 3.1 vector shape for CVE-2021-30334Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Qualcomm, Inc.Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Voice & Music, Snapdragon WearablesAPQ8009W, AQT1000, AR8031, AR8035, CSRA6620, CSRA6640, CSRB31024, FSM10055, FSM10056, MDM9150, MSM8909W, QAM8295P, QCA6174A, QCA6390, QCA6391, QCA6426, QCA6436, QCA6564, QCA6564A, QCA6564AU, QCA6574, QCA6574A, QCA6574AU, QCA6595AU, QCA6696, QCA8081, QCA8337, QCA9377, QCM2290, QCM4290, QCM6125, QCM6490, QCN9011, QCN9012, QCS2290, QCS405, QCS410, QCS4290, QCS603, QCS605, QCS610, QCS6125, QCS6490, QCS8155, QCX315, QET4101, QRB5165, QRB5165M, QRB5165N, QSM8250, QSW8573, SA4150P, SA4155P, SA415M, SA515M, SA6145P, SA6150P, SA6155, SA6155P, SA8145P, SA8150P, SA8155, SA8155P, SA8195P, SA8295P, SD 675, SD 8 Gen1 5G, SD205, SD210, SD429, SD439, SD460, SD480, SD660, SD662, SD665, SD675, SD678, SD690 5G, SD720G, SD730, SD750G, SD765, SD765G, SD768G, SD778G, SD780G, SD855, SD865 5G, SD870, SD888, SD888 5G, SDA429W, SDM429W, SDX24, SDX55, SDX55M, SDX65, SDXR1, SDXR2 5G, SM6250, SM6250P, SM6375, SM7250P, SM7315, SM7325P, SW5100, SW5100P, SXR2150P, WCD9335, WCD9360, WCD9370, WCD9375, WCD9380, WCD9385, WCN3610 ...[truncated*]Listed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.