What’s Vulnerable › Vulnerabilities

CVE-2026-98702: wifi: mac80211: reject invalid 320 MHz CSA bandwidth

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-18 · updated 2026-10-19

Description

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.

Affected products

• Linux kernel: 6.9 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/1892e71aa2e5ee667d87c6e49e3661f5e290303b
• https://git.kernel.org/stable/c/56e236759f0a8dc910c2ae7cd3c161f298ee5794
• https://git.kernel.org/stable/c/79b3ce0d881cd6e5d4d3496b19f5cc5e7089a56c
• https://git.kernel.org/stable/c/cf0ddacce173890407ed3fa50c8ea9b3c0cc0e16

Get alerted when CVE-2026-98702 or the next vulnerability affects your stack