Security readout for executives and security teams
Plain-English summary
CVE-2021-46666 is a MariaDB crash issue in versions before 10.6.2. A malformed or problematic query path involving HAVING-to-WHERE optimization can crash the database application. The main business concern is service availability, not confirmed data theft or privilege escalation based on the supplied sources.
Executive priority
Treat this as an availability risk requiring inventory-driven remediation. Escalate priority for critical services, internet-facing database access, or vendor platforms confirming impact. Current evidence is insufficient to justify emergency exploitation response.
Technical view
MariaDB before 10.6.2 mishandles optimizer pushdown from a HAVING clause to a WHERE clause, causing an application crash. The source bundle does not provide CVSS, CWE, detailed affected version ranges, exploitability details, or proof of active exploitation.
Likely exposure
Exposure is most likely where MariaDB versions before 10.6.2 are used directly or embedded in vendor products. The supplied affected-product metadata is incomplete, so confirm exposure through asset inventory and vendor advisories.
Exploitation context
The supplied sources do not show CISA KEV listing or active exploitation. Evidence supports a crash condition, but not remote exploit status, authentication requirements, or reliable exploit availability.
Researcher notes
Key gaps are CVSS, CWE, exact affected branches, authentication context, and exploit preconditions. The available description points to optimizer behavior involving HAVING pushdown into WHERE and crash impact only. Avoid assuming confidentiality or integrity impact without vendor evidence.
Mitigation direction
- Inventory MariaDB deployments and record exact server versions.
- Move systems off MariaDB versions before 10.6.2 following vendor guidance.
- Review MariaDB security guidance for supported fixed release paths.
- Check NetApp advisory NTAP-20220221-0002 for product-specific guidance.
- Prioritize externally reachable or business-critical database services.
Validation and detection
- Compare deployed MariaDB versions against the before-10.6.2 affected statement.
- Check vendor appliances for bundled MariaDB exposure.
- Review database logs for unexplained crashes around aggregate query workloads.
- Confirm monitoring alerts on database process crashes and service restarts.
- Document any unsupported MariaDB versions requiring upgrade or isolation.
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-2021-46666 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://jira.mariadb.org/browse/MDEV-25635CVE reference · x_refsource_MISC
- https://security.netapp.com/advisory/ntap-20220221-0002/CVE reference · x_refsource_CONFIRM
- https://mariadb.com/kb/en/security/CVE 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.