Security readout for executives and security teams
Plain-English summary
This Qualcomm Snapdragon issue is a race condition in message client registration. On affected devices, a local attacker could potentially interfere with how clients register and cause serious confidentiality, integrity, or availability impact. The source bundle does not show active exploitation.
Executive priority
Treat this as high priority for mobile and embedded fleets with affected Qualcomm hardware. Business urgency depends on whether your OEMs shipped fixes and whether impacted devices remain in service without current firmware.
Technical view
CVE-2021-35095 involves improper serialization of Gunyah message queue client registration, allowing multiple clients to register the same label. CVSS 3.1 is 8.4: local attack vector, low complexity, no privileges, no user interaction, with high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is most likely in devices or embedded products using the listed Qualcomm Snapdragon Connectivity or Snapdragon Mobile components, including SD 8 Gen1 5G, SDX65, WCN6855, and related parts. Downstream device models and fixed firmware levels are not provided in the bundle.
Exploitation context
The bundle marks KEV as false and provides no cited evidence of active exploitation. CVSS indicates local access is required, but no privileges or user interaction are required once that local attack path exists.
Researcher notes
The source bundle does not include CWE mapping, exploit evidence, or fixed version details. Research should focus on affected component presence, downstream OEM patch incorporation, and whether local attack surfaces expose Gunyah message client behavior.
Mitigation direction
- Review Qualcomm’s April 2022 security bulletin for vendor guidance.
- Check OEM firmware advisories for affected device models and updates.
- Prioritize firmware updates for devices with listed Qualcomm components.
- Restrict local access paths where affected devices cannot be updated promptly.
Validation and detection
- Inventory devices using the listed Snapdragon Connectivity or Mobile components.
- Compare firmware patch levels against Qualcomm and OEM guidance.
- Confirm whether mobile fleet devices include SD 8 Gen1 5G or SDX65-class parts.
- Track exceptions where OEM fixed-version evidence is unavailable.
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-2021-35095 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/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.