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CVE Record

CVE-2021-35132: Out of bound write in DSP service due to improper bound check for response buffer size in Snapdragon Auto,...

Out of bound write in DSP service due to improper bound check for response buffer size in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Mobile, 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

This flaw is a memory corruption issue in Qualcomm Snapdragon DSP service code. A local attacker could potentially compromise confidentiality, integrity, and availability on affected devices. The business concern is broad hardware exposure across mobile, automotive, IoT, compute, connectivity, and wearable products, not a single application.

Executive priority

Treat this as a high-priority firmware exposure review for Qualcomm-based devices. Urgency is highest where affected devices process sensitive data, are difficult to patch, or permit installation of untrusted local code.

Technical view

CVE-2021-35132 is an out-of-bounds write caused by improper bounds checking for a DSP service response buffer. CVSS 3.1 is 8.4 with local attack vector, low complexity, no privileges, no user interaction, unchanged scope, and high impact to confidentiality, integrity, and availability.

Likely exposure

Exposure depends on whether deployed devices use the listed Qualcomm Snapdragon components. The affected list spans many chipsets and product families, so asset inventory should include phones, embedded devices, vehicle systems, IoT equipment, wearables, and connectivity modules.

Exploitation context

The supplied sources do not cite active exploitation, and KEV status is false. The CVSS vector indicates local access is required, but no privileges or user interaction are needed once local attack conditions exist.

Researcher notes

The public description is limited to vulnerability class, affected products, and CVSS. It does not provide patch identifiers, exploit details, or proof of active exploitation. Validation should focus on component mapping and vendor bulletin correlation.

Mitigation direction

  • Identify devices and products using affected Qualcomm Snapdragon components.
  • Check Qualcomm July 2022 bulletin and OEM advisories for applicable firmware updates.
  • Apply OEM firmware or security updates that include the vendor fix, where available.
  • Use device management controls to limit untrusted local code execution.
  • Track unsupported affected devices for replacement or compensating controls.

Validation and detection

  • Compare hardware BOMs and fleet inventories against the affected component list.
  • Confirm OEM patch notes reference CVE-2021-35132 or Qualcomm July 2022 security content.
  • Verify deployed firmware versions match vendor-fixed releases.
  • Review mobile, IoT, automotive, and embedded procurement records for affected Snapdragon parts.
Prepared
Confidence
high
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-2021-35132 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-2021-35132Attack 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 Mobile, Snapdragon WearablesAQT1000, AR8035, QCA6390, QCA6391, QCA6420, QCA6421, QCA6426, QCA6430, QCA6431, QCA6436, QCA6574, QCA6574A, QCA6574AU, QCA6595AU, QCA6696, QCA8081, QCA8337, QCM2290, QCM4290, QCM6490, QCS2290, QCS410, QCS4290, QCS610, QCS6490, QRB5165, QRB5165M, QRB5165N, QSM8350, SA515M, SA6155, SA6155P, SA8155, SA8155P, SA8195P, SA8540P, SA9000P, SD 675, SD 8cx Gen2, SD 8cx Gen3, SD429, SD460, SD480, SD662, SD665, SD670, SD675, SD678, SD680, SD690 5G, SD695, SD710, SD720G, SD730, SD750G, SD765, SD765G, SD768G, SD778G, SD780G, SD7c, SD855, SD865 5G, SD870, SD888, SD888 5G, SDM429W, SDX50M, SDX55, SDX55M, SDX65, SDXR2 5G, SM4125, SM6250, SM6250P, SM7250P, SM7315, SM7325P, SW5100, SW5100P, WCD9326, WCD9340, WCD9341, WCD9360, WCD9370, WCD9371, WCD9375, WCD9380, WCD9385, WCN3620, WCN3660B, WCN3910, WCN3950, WCN3980, WCN3988, WCN3990, WCN3991, WCN3998, WCN6740, WCN6750, WCN6850, WCN6851, WCN6855, WCN6856, WCN7850, WCN7851, WSA8810, WSA8815, 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.