wifi: mac80211: reject invalid 320 MHz CSA bandwidth

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Summary

CVECVE-2026-98702
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-18 16:17:23 UTC
Updated2026-10-19 10:19:34 UTC
DescriptionIn 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.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 21c3f8f95554feff9bed15703e89adbe582e0383 cf0ddacce173890407ed3fa50c8ea9b3c0cc0e16 git Not specified
CNA Linux Linux affected 21c3f8f95554feff9bed15703e89adbe582e0383 1892e71aa2e5ee667d87c6e49e3661f5e290303b git Not specified
CNA Linux Linux affected 21c3f8f95554feff9bed15703e89adbe582e0383 79b3ce0d881cd6e5d4d3496b19f5cc5e7089a56c git Not specified
CNA Linux Linux affected 21c3f8f95554feff9bed15703e89adbe582e0383 56e236759f0a8dc910c2ae7cd3c161f298ee5794 git Not specified
CNA Linux Linux affected 6.9 Not specified
CNA Linux Linux unaffected 6.9 semver Not specified
CNA Linux Linux unaffected 6.12.113 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.56 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.10 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/56e236759f0a8dc910c2ae7cd3c161f298ee5794 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/79b3ce0d881cd6e5d4d3496b19f5cc5e7089a56c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/cf0ddacce173890407ed3fa50c8ea9b3c0cc0e16 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/1892e71aa2e5ee667d87c6e49e3661f5e290303b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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