CVE-2026-98327

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxb8456a14e9d2770846fcf74de18ff95b676149a3 < aba8dfb45864441199748c33ce3c1c8ca121c8bdaffected
LinuxLinuxb8456a14e9d2770846fcf74de18ff95b676149a3 < bd3b21145ae2e781daac1bbd19216a63ab4e0cbdaffected
LinuxLinuxb8456a14e9d2770846fcf74de18ff95b676149a3 < ba5bf83a81e8832cb84bb3a2da67512f81f57a02affected
LinuxLinuxb8456a14e9d2770846fcf74de18ff95b676149a3 < 860134b3af77970e006feab7e5decb8c84771c7faffected
LinuxLinux3.13affected
LinuxLinux0 < 3.13unaffected
LinuxLinux6.12.112 <= 6.12.*unaffected
LinuxLinux6.18.54 <= 6.18.*unaffected
LinuxLinux7.2.8 <= 7.2.*unaffected
LinuxLinux7.3-rc4 <= *unaffected

Weaknesses

References