Security readout for executives and security teams
Plain-English summary
This Linux kernel issue can crash systems using the Realtek rtw89 8852A Wi-Fi driver when RF calibration results produce a zero divisor. The known impact from the sources is availability: a kernel divide error and core dump during Wi-Fi connection handling. There is no cited evidence of active exploitation.
Executive priority
Treat this as a targeted availability risk for Linux endpoints with specific Realtek Wi-Fi hardware. It does not currently justify emergency enterprise-wide action without matching hardware exposure, but affected fleets should receive normal kernel security updates promptly.
Technical view
The rtw89 8852A RF calibration path, specifically DPK result handling in rtw8852a_dpk, could divide by zero after a negative calibration result. The kernel fix replaces direct division with phy_div(), which returns zero when the divisor is zero. The crash trace involves wpa_supplicant, mac80211, cfg80211, and nl80211 authentication flow.
Likely exposure
Exposure is likely limited to Linux systems using the rtw89 driver with Realtek 8852A Wi-Fi hardware. Servers without this wireless chipset or driver are unlikely to be exposed. Distribution backports may change affected status, so package-level verification is required.
Exploitation context
The source describes a crash condition during Wi-Fi calibration and connection handling, not privilege escalation or code execution. KEV status is false, and the provided sources do not report public exploitation. Triggerability by nearby Wi-Fi conditions or normal connection activity is not fully established.
Researcher notes
Evidence is limited to the CVE record and kernel stable fixes. No CVSS, CWE, exploit maturity, or distro-specific fixed package data is included. The record’s affected version data is not enough to determine every downstream kernel exposure without vendor advisories.
Mitigation direction
- Update to a kernel containing one of the referenced stable fixes.
- Check Linux distribution advisories for backported rtw89 fixes.
- Disable or avoid affected Realtek 8852A Wi-Fi hardware where updates are unavailable.
- Prioritize laptops, workstations, and embedded devices using rtw89 Wi-Fi.
- Monitor for recurring kernel divide errors in rtw89_core.
Validation and detection
- Inventory systems for Realtek 8852A hardware and loaded rtw89 modules.
- Compare running kernel packages against vendor fixed versions or backport notes.
- Review kernel logs for rtw8852a_dpk divide errors or rtw89_core crashes.
- Confirm the fix commit or equivalent patch is present in deployed kernels.
- Validate Wi-Fi association no longer triggers kernel crashes after updating.
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-2022-50178 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.
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.
Source materials
- CVE List V5 sourceCVE List V5
- https://git.kernel.org/stable/c/065e83ac83c0c0e615b96947145c85c4bd76c09aCVE reference, Linux
- https://git.kernel.org/stable/c/5abc81a138f873ab55223ec674afc3a3f945d60fCVE reference, Linux
- https://git.kernel.org/stable/c/683a4647a7a3044868cfdc14c117525091b9fa0cCVE 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.