Security readout for executives and security teams
Plain-English summary
This is a Linux kernel driver reliability flaw in the MediaTek mt7921e Wi-Fi driver. Under a rapid driver reload stress condition, the kernel can crash. Evidence points to local, privileged conditions rather than remote exploitation. There is no CISA KEV listing or cited evidence of active exploitation.
Executive priority
Treat as routine patch management unless affected laptops or appliances frequently reload Wi-Fi drivers. The risk is mainly local system crash, not confirmed remote compromise. Prioritize through normal kernel update cycles for exposed fleets.
Technical view
CVE-2022-50714 fixes a crash in mt76/mt7921e during module removal when driver data is not ready before probe completion. The reported crash occurs in mt7921_pci_remove() during work cancellation. Linux stable commits are referenced as fixes; CVSS and CWE details are not provided in the source bundle.
Likely exposure
Exposure is likely limited to Linux systems using the mt7921e PCIe Wi-Fi driver, especially kernels in affected ranges before stable fixes. Practical triggering appears to require local ability to load or unload kernel modules, typically privileged access.
Exploitation context
The public description ties the issue to an insmod/rmmod driver reload stress test. No source in the bundle claims remote exploitation, privilege escalation, public weaponization, or active exploitation. Business impact is most likely local denial of service through a kernel crash.
Researcher notes
The source bundle lacks CVSS, CWE, and detailed affected range formatting. It references three Linux stable commits and describes a KASAN user-memory-access crash during mt7921e removal. Avoid assuming exploitability beyond the documented local crash condition.
Mitigation direction
- Update to a kernel containing the referenced Linux stable fixes.
- Check your Linux distribution advisory for the backported fixed package.
- Prioritize systems with MediaTek MT7921e Wi-Fi hardware and module reload workflows.
- Restrict kernel module load and unload permissions to trusted administrators.
Validation and detection
- Inventory systems using the mt7921e or mt76 Linux Wi-Fi drivers.
- Compare running kernel versions against distro-fixed packages or referenced stable commits.
- Review kernel logs for mt7921_pci_remove or rmmod crash signatures.
- Confirm patched systems no longer carry the affected driver code path.
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
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CVE-2022-50714 mapping review
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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
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.