Security readout for executives and security teams
Plain-English summary
CVE-2021-35098 is a Qualcomm Snapdragon flaw where poor session ID validation in the PCM routing process can corrupt memory. It affects many Snapdragon-based product families. The issue requires local access with high privileges, so it is not an internet-facing bug, but successful exploitation could affect confidentiality, integrity, and availability.
Executive priority
Treat this as a moderate firmware supply-chain risk. It is not shown as remotely exploitable or actively exploited, but affected Snapdragon platforms are broad. Prioritize confirmation and patch tracking for business-critical, managed, or long-lived embedded devices.
Technical view
The CVE describes improper validation of a session ID in Qualcomm's PCM routing process, leading to memory corruption. CVSS 3.1 is 6.7 with AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H. The affected list spans Snapdragon Auto, Compute, Connectivity, IoT, Mobile, Voice & Music, and Wearables parts.
Likely exposure
Exposure is most likely in devices, firmware images, drivers, or embedded products using the listed Qualcomm Snapdragon chipsets or related components. Confirm through hardware BOMs, OEM firmware notes, Android/vendor security bulletins, and Qualcomm May 2022 bulletin mapping.
Exploitation context
The supplied sources do not show active exploitation, and KEV is false. The CVSS vector indicates exploitation requires local access and high privileges, with no user interaction. That lowers broad attack likelihood but keeps impact meaningful on already-compromised or multi-user systems.
Researcher notes
The bundle gives CVSS, affected Qualcomm part numbers, and the root-cause summary, but no CWE, fixed build identifiers, proof-of-concept status, or detailed exploitability notes. Avoid assuming product impact without OEM-specific mapping.
Mitigation direction
- Check Qualcomm and OEM guidance for CVE-2021-35098-specific updates.
- Apply vendor or OEM firmware updates that include the Qualcomm May 2022 fixes.
- Inventory products using the listed Qualcomm chipsets and modules.
- Prioritize managed devices where high-privileged local code execution is realistic.
- Monitor OEM bulletins for backported fixes or end-of-support gaps.
Validation and detection
- Map device BOMs and firmware builds to the affected Qualcomm part list.
- Confirm whether the installed firmware includes CVE-2021-35098 remediation.
- Review OEM security bulletins for this CVE and product-specific applicability.
- Check fleet telemetry for outdated vendor firmware on affected Snapdragon platforms.
- Document unsupported affected devices for risk acceptance or replacement planning.
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-2021-35098 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
- Medium
- CVSS
- 6.7 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:H/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:H/UI:N/S:U/C:H/I:H/A:H0.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.7MediumVector: CVSS:3.1/AV:L/AC:L/PR:H/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/may-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.