CVE-2026-90366

Summary

In the Linux kernel, the following vulnerability has been resolved:

wifi: mt76: mt7996: reserve space for the CSA-abort countdown TLV

When a CSA countdown is active, mt7996_mcu_beacon_cntdwn() emits two bss_bcn_cntdwn_tlv entries (the CSA countdown and the CCA-abort BCC), but MT7996_BEACON_UPDATE_SIZE only reserved one. With MBSSID enabled and a near-maximum beacon template the extra 8 bytes could push the offload command past MT7996_MAX_BSS_OFFLOAD_SIZE and trigger skb_over_panic(). Reserve room for both countdown TLVs.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux98686cd21624c75a043e96812beadddf4f6f48e5 < 1d348f96623ec20d700af7d4dfc00a74da6238acaffected
LinuxLinux98686cd21624c75a043e96812beadddf4f6f48e5 < bc1d694a1ffe0062c3adf0db1d64ad54454398ecaffected
LinuxLinux98686cd21624c75a043e96812beadddf4f6f48e5 < 45d8896e4cffffb2c6554ccbec6efe7a0d53166faffected
LinuxLinux98686cd21624c75a043e96812beadddf4f6f48e5 < 1a51aff0e048dc5b8252d65808b79939c942d6ecaffected
LinuxLinux98686cd21624c75a043e96812beadddf4f6f48e5 < 50c66bab321140c49aa2ed779a3ec9d2f085b458affected
LinuxLinux6.2affected
LinuxLinux0 < 6.2unaffected
LinuxLinux6.6.157 <= 6.6.*unaffected
LinuxLinux6.12.110 <= 6.12.*unaffected
LinuxLinux6.18.52 <= 6.18.*unaffected
LinuxLinux7.2.6 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References