Security readout for executives and security teams
Plain-English summary
CVE-2026-21385 is a high-severity Qualcomm Snapdragon graphics flaw. A local user or process with low privileges could trigger memory corruption, potentially affecting confidentiality, integrity, and availability. It matters most for organizations with Snapdragon-based mobile, automotive, IoT, wearable, collaboration, or embedded devices.
Executive priority
Treat as a high-priority lifecycle and patch-management issue, not a confirmed active-exploitation emergency. Focus first on high-value fleets and devices that cannot be quickly updated because Qualcomm exposure is broad and remediation depends on OEM delivery.
Technical view
The issue is an integer overflow or wraparound in graphics memory-allocation alignment handling, classified as CWE-190. Qualcomm describes memory corruption while using alignments for memory allocation. CVSS 3.1 is 7.8: local attack vector, low complexity, low privileges required, no user interaction, and high CIA impact.
Likely exposure
Exposure depends on whether deployed devices use one of the listed Qualcomm Snapdragon platforms or components and whether the vulnerable graphics software is present. The affected list is broad across mobile, automotive, compute, connectivity, IoT, XR, robotics, and audio-related Snapdragon products.
Exploitation context
The provided CISA KEV reference does not indicate known exploited status for this CVE, and the bundle marks KEV as false. The CVSS vector indicates exploitation is local, requires low privileges, and does not require user interaction. No public exploit details are provided in the source bundle.
Researcher notes
Key unknowns in the provided sources include the exact graphics component, affected software branch details, and OEM patch availability by device model. Avoid assuming all listed platforms are vulnerable in every product configuration; validate against Qualcomm and OEM advisories.
Mitigation direction
- Review Qualcomm’s March 2026 security bulletin for vendor-specific remediation guidance.
- Request firmware, driver, or OS updates from device OEMs using affected Snapdragon platforms.
- Prioritize managed devices with sensitive data, shared use, or exposed local attack surfaces.
- Monitor Android and OEM security bulletins for integration status and rollout timing.
- If no update is available, apply compensating controls recommended by the OEM.
Validation and detection
- Inventory devices and chipsets against Qualcomm’s affected product list.
- Confirm OEM firmware or security bulletin status for each affected model.
- Check Android bulletin applicability for Android-based devices using Qualcomm components.
- Track whether CISA KEV status changes for CVE-2026-21385.
- Document exceptions where OEM remediation is unavailable or unsupported.
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.
CWE-190: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-21385 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
- 7.8 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/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.
CISA KEV status
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:L/UI:N/S:U/C:H/I:H/A:H1.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://docs.qualcomm.com/product/publicresources/securitybulletin/march-2026-bulletin.htmlCVE reference
- https://source.android.com/docs/security/bulletin/2026/2026-03-01CVE reference · third-party-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-21385CVE reference · government-resource
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.
Integer Overflow or Wraparound
Integer Overflow or Wraparound represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.