Security readout for executives and security teams
Plain-English summary
This CVE describes a Linux kernel issue in the mt76 MediaTek Wi-Fi driver path. The documented symptom is a kernel warning when adding a monitor interface, not a confirmed remote compromise. Business urgency depends on whether affected Linux kernels and MediaTek mt76/mt7921 wireless hardware are in use.
Executive priority
Handle through normal kernel maintenance unless affected wireless systems are critical, exposed to untrusted local users, or used for monitoring operations. There is no sourced evidence of active exploitation in this bundle.
Technical view
The issue was resolved in the Linux kernel mt76 connac code, specifically mt76_connac_mcu_uni_add_dev. The source shows warnings triggered during monitor interface creation through mac80211. Public metadata lists Linux 5.12-era versions as affected and links two stable kernel fixes.
Likely exposure
Exposure appears limited to Linux systems running affected kernel versions with the mt76 connac/mt7921 wireless driver path and monitor interface operations. The bundle does not identify cloud services, userland applications, or broad network-facing exposure.
Exploitation context
The supplied sources do not show active exploitation, KEV listing, public exploit availability, or a privilege-escalation impact. Evidence supports a kernel warning triggered by adding a monitor interface. Treat exploitation status as unconfirmed.
Researcher notes
The record lacks CVSS, CWE, and a detailed security impact statement. Analysis should stay close to the kernel warning and linked stable commits. Do not infer remote attackability or exploitability without additional vendor evidence.
Mitigation direction
- Update to a vendor-supported kernel containing the referenced stable fixes.
- Check distribution advisories for backported fixes to affected kernels.
- Avoid unnecessary monitor-interface use on affected mt76 systems until patched.
- Prioritize systems where MediaTek mt76 Wi-Fi is operationally important.
- Track vendor guidance if running custom or embedded kernels.
Validation and detection
- Inventory Linux kernel versions on systems using MediaTek mt76 wireless drivers.
- Confirm whether mt76_connac or mt7921 modules are present and loaded.
- Check vendor kernel changelogs for the referenced stable commits.
- Review kernel logs for warnings during monitor interface creation.
- Verify patched systems no longer reproduce the documented warning.
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-2021-47029 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.
SSVC decision data
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://git.kernel.org/stable/c/2554b9cb4b5e097c6071ec3ed5bc7c665c477ca7CVE reference, Linux
- https://git.kernel.org/stable/c/c996f0346e40e3b1ac2ebaf0681df898fb157f60CVE reference, Linux
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.