wifi: mac80211: reject invalid 320 MHz CSA bandwidth
CVSS score
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EPSS probability
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Risk score
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Published
12 h ago
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Vulnerability description
CVE AI research
DayBreach AI Explanation
Verified against sourcesSources read
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Source agreement
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Evidence confidence
%63
Short explanation
A vulnerability in the Linux kernel mac80211 subsystem has been identified where processing an invalid 320 MHz CSA bandwidth indication leads to uninitialized reads and potential kernel panics.
With panic_on_warn enabled, a received frame can cause the kernel to panic.
What should be done?
- Follow vendor advisories and apply available updates
- Reject channel definitions prior to VHT operation conversion
Chain of evidence and sources
HT/VHT kanal tanımı doğrulayıcısı 6 GHz harici bir bağlantı üzerinden 320 MHz bant genişliği alabilir.
panic_on_warn etkinken alınan bir çerçeve çekirdeği çökertebilir.
Show the technical text from the sources
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: reject invalid 320 MHz CSA bandwidth The HT/VHT channel definition validator can receive a 320 MHz bandwidth indication from a received CSA frame on a non-6 GHz link. It warns for this unsupported width but continues with an uninitialized vht_operation.chan_width, which is then read by ieee80211_chandef_vht_oper(). With panic_on_warn enabled, this lets a received frame panic the kernel. Reject the channel definition before entering the VHT operation conversion. This preserves the existing CSA fallback while avoiding both the warning and the uninitialized read.
Explanation produced with the local gemini-flash-lite-latest model. Numerical metrics and the KEV, patch and exploit statuses are not determined by AI.
IMPACT: Affected Products and Software
RED HAT CSAF/VEX: Product Impact Check
SCORING: CVSS from Multiple Sources
CVSS Scores
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| SCORE | VERSION | SEVERITY | VECTOR | SOURCE |
|---|---|---|---|---|
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Patch and Remediation Guide
Solution & Remediation Advisory
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Public exploit and active exploitation status
Verified exploit intelligence
No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.
Weakness Classification and Attack Patterns (CWE & CAPEC)
CWE - Common Weakness Enumeration
While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-98702 is associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-98702 weaknesses.
Official Sources and Advisories
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