CVE-2026-98702wifi: mac80211: reject invalid 320 MHz CSA bandwidth
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 18, 2026
- First seen by InfoSec Signals
- Oct 18, 2026
Affected products
Linux Linux linux:linux (from the name) | from 21c3f8f95554feff9bed15703e89adbe582e0383 before cf0ddacce173890407ed3fa50c8ea9b3c0cc0e16; from 21c3f8f95554feff9bed15703e89adbe582e0383 before 1892e71aa2e5ee667d87c6e49e3661f5e290303b; from 21c3f8f95554feff9bed15703e89adbe582e0383 before 79b3ce0d881cd6e5d4d3496b19f5cc5e7089a56c; from 21c3f8f95554feff9bed15703e89adbe582e0383 before 56e236759f0a8dc910c2ae7cd3c161f298ee5794 | CNA record |
References
- https://git.kernel.org/stable/c/cf0ddacce173890407ed3fa50c8ea9b3c0cc0e16
- https://git.kernel.org/stable/c/1892e71aa2e5ee667d87c6e49e3661f5e290303b
- https://git.kernel.org/stable/c/79b3ce0d881cd6e5d4d3496b19f5cc5e7089a56c
- https://git.kernel.org/stable/c/56e236759f0a8dc910c2ae7cd3c161f298ee5794
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.