Disclosure summary
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: mesh: reset the CSA state when leaving ifmsh->csa is allocated in ieee80211_mesh_csa_beacon() and only freed in ieee80211_mesh_finish_csa(), i.e. when the channel switch completes. Leaving the mesh while a switch is still pending therefore leaks it. Additionally, ifmsh->csa_role and ifmsh->chsw_ttl have their state leak in this case, so things can get mixed up in addition to the memory leak. Refactor the reset and call it in ieee80211_stop_mesh() to fix it all.
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
Microsoft Security Updates (CVRF) · 2026-Oct
Open original source · Updated Oct 06, 2026
wifi: mac80211: mesh: reset the CSA state when leaving
Maximum of vendor-reported product scores; products and fixed builds are associations, not a universal affected-version statement.
Microsoft maximum product score: 9.8
| Vendor | Product / association | Version / bounds |
|---|---|---|
| Microsoft update guide | azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 | (MSRC status code 3) |
Vendor remediation references
- Release Notes · product IDs 21932-17084
- Vendor guidance · product IDs 21932-17084
NIST National Vulnerability Database · NVD-CVE-2026-98327
Open original source · Updated Oct 06, 2026
Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.
Original records & references
PUBLISHED 2026-10-06T05:18:24-04:00
MODIFIED 2026-10-06T05:18:24-04:00
INGESTED 2026-10-06T11:45:53-04:00