CVE-2026-98327 is a vulnerability in Linux Kernel
Published on October 6, 2026
wifi: mac80211: mesh: reset the CSA state when leaving
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.
Products Associated with CVE-2026-98327
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Affected Versions
Linux:- Version b8456a14e9d2770846fcf74de18ff95b676149a3 and below aba8dfb45864441199748c33ce3c1c8ca121c8bd is affected.
- Version b8456a14e9d2770846fcf74de18ff95b676149a3 and below bd3b21145ae2e781daac1bbd19216a63ab4e0cbd is affected.
- Version b8456a14e9d2770846fcf74de18ff95b676149a3 and below ba5bf83a81e8832cb84bb3a2da67512f81f57a02 is affected.
- Version b8456a14e9d2770846fcf74de18ff95b676149a3 and below 860134b3af77970e006feab7e5decb8c84771c7f is affected.
- Version 3.13 is affected.
- Before 3.13 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.