CVE-2026-98326 is a vulnerability in Linux Kernel
Published on October 6, 2026
wifi: mac80211: mesh: release the channel if start fails
In the Linux kernel, the following vulnerability has been resolved:
wifi: mac80211: mesh: release the channel if start fails
ieee80211_join_mesh() acquires a channel context and then calls
ieee80211_start_mesh(), which can fail. In that case, the chanctx
isn't released then interface removal will attempt to unassign it
after it's removed from the driver, hitting:
wlan0: Failed check-sdata-in-driver check, flags: 0x0
WARNING: net/mac80211/driver-ops.c:366 at drv_unassign_vif_chanctx
ieee80211_assign_link_chanctx
__ieee80211_link_release_channel
ieee80211_link_release_channel
ieee80211_teardown_sdata
unregister_netdevice_many_notify
_cfg80211_unregister_wdev
ieee80211_remove_interfaces
ieee80211_unregister_hw
mac80211_hwsim_del_radio
hwsim_exit_net
Correctly release the channel on start failures.
Products Associated with CVE-2026-98326
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Affected Versions
Linux:- Version 2b5e19677592c167d012c2d129407f39d2bdeb8d and below f0afcec2129c166e61821d6ae097061155f01b12 is affected.
- Version 2b5e19677592c167d012c2d129407f39d2bdeb8d and below b51f5a310bd6888b90bb9546a8081215dcfe6fbe is affected.
- Version 2b5e19677592c167d012c2d129407f39d2bdeb8d and below 632f7acfe6dac1278a9314eaaab14fada400ddaf is affected.
- Version 2b5e19677592c167d012c2d129407f39d2bdeb8d and below 41bee71112db53651ba9a9030de1b843255a4a7f is affected.
- Version 2b5e19677592c167d012c2d129407f39d2bdeb8d and below 4a4e3fa77ea36d3419d806fb5883ef425a605a5d is affected.
- Version 2b5e19677592c167d012c2d129407f39d2bdeb8d and below ae97fff6495a8764bc0ef281cfe5444f701e527f is affected.
- Version 3.9 is affected.
- Before 3.9 is unaffected.
- Version 6.1.189, <= 6.1.* is unaffected.
- Version 6.6.158, <= 6.6.* is unaffected.
- Version 6.12.112, <= 6.12.* is unaffected.
- Version 6.18.54, <= 6.18.* is unaffected.
- Version 7.2.8, <= 7.2.* is unaffected.
- Version 7.3-rc4, <= * is unaffected.