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CVE Record

CVE-2021-30342: Improper integrity check can lead to race condition between tasks PDCP and RRC?

Improper integrity check can lead to race condition between tasks PDCP and RRC? after a valid RRC Command packet has been received in Snapdragon Auto, Snapdragon Compute, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Voice & Music, Snapdragon Wearables

CriticalCVSS 9.1Not KEV-listedUpdated
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Glexia's TakeAutomated analysiscritical

Security readout for executives and security teams

Plain-English summary

This is a critical Qualcomm Snapdragon vulnerability affecting multiple embedded, automotive, compute, IoT, wearable, and audio product families. The issue involves a flawed integrity check that can create a race condition after a valid RRC command packet is received. Business risk depends on whether deployed devices contain affected chipsets and have received OEM firmware fixes.

Executive priority

Treat as high-priority for environments relying on affected embedded or connected devices, especially automotive, industrial, and managed IoT fleets. Urgency is driven by critical CVSS severity and broad chipset coverage, not by confirmed exploitation in the supplied sources.

Technical view

CVE-2021-30342 is described as an improper integrity check causing a PDCP/RRC task race condition after a valid RRC Command packet. The CVSS 3.1 score is 9.1 with network attack vector, low complexity, no privileges, no user interaction, and high confidentiality and integrity impact. Availability impact is not identified.

Likely exposure

Exposure is most likely in products using the listed Qualcomm Snapdragon chipsets across Auto, Compute, Consumer IoT, Industrial IoT, Voice & Music, and Wearables. Asset owners may need OEM or carrier firmware mapping because Qualcomm components are usually embedded inside finished devices.

Exploitation context

The provided sources do not show CISA KEV listing or active exploitation evidence. The CVSS vector indicates a remotely reachable, unauthenticated condition, but the bundle does not provide exploit prerequisites beyond receipt of a valid RRC Command packet.

Researcher notes

The source bundle gives limited root-cause detail, no CWE, and no exploit-status evidence. Focus research on chipset-to-device mapping, OEM firmware provenance, and whether Qualcomm’s April 2022 bulletin or downstream vendors document corrected builds.

Mitigation direction

  • Review Qualcomm’s April 2022 bulletin for vendor guidance.
  • Obtain firmware advisories from affected device OEMs or carriers.
  • Prioritize updates for internet-connected, field-deployed, or safety-relevant devices.
  • Retire or isolate unsupported devices using affected chipsets.
  • Track remediation status by device model and firmware version.

Validation and detection

  • Inventory devices containing Qualcomm Snapdragon components.
  • Map hardware identifiers to the affected chipset list.
  • Check OEM firmware versions against vendor security bulletins.
  • Confirm whether the device vendor references CVE-2021-30342.
  • Document devices with no available patch or vendor response.
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

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CVE-2021-30342 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
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

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
9.1CVSS 3.1CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N3.95.2Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

9.1Critical
CVSS 3.1 vector shape for CVE-2021-30342Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

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 Consumer IOT, Snapdragon Industrial IOT, Snapdragon Voice & Music, Snapdragon WearablesAPQ8009W, APQ8017, APQ8096AU, AQT1000, CSRB31024, FSM10055, FSM10056, MDM8207, MDM9150, MDM9205, MDM9206, MDM9207, MDM9250, MDM9607, MDM9628, MDM9640, MDM9650, MDM9655, MSM8909W, MSM8996AU, QCA4004, QCA6174A, QCA6420, QCA6430, QCA6564A, QCA6564AU, QCA6574, QCA6574A, QCA6574AU, QCA6584, QCA6584AU, QCA6595AU, QCA6696, QCA9367, QCA9377, QCM2290, QCM4290, QCM6125, QCS2290, QCS410, QCS4290, QCS610, QCS6125, QSW8573, SA415M, SA6145P, SA6150P, SA6155P, SA8145P, SA8150P, SA8155P, SA8195P, SD 675, SD 8cx Gen2, SD205, SD210, SD429, SD439, SD460, SD660, SD662, SD665, SD675, SD678, SD680, SD720G, SD730, SD7c, SD850, SD855, SDA429W, SDM429W, SDW2500, SDX12, SDX20, SDX24, SDXR1, SM6250, SM6250P, SW5100, SW5100P, WCD9306, WCD9330, WCD9370, WCD9375, WCD9380, WCN3610, WCN3620, WCN3910, WCN3950, WCN3988, WCN3991, WCN3998, WSA8830, WSA8835Listed
Weakness

CWE details

No CWE listed

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