Bug 2536146 (CVE-2026-90366) - CVE-2026-90366 kernel: wifi: mt76: mt7996: reserve space for the CSA-abort countdown TLV
Summary: CVE-2026-90366 kernel: wifi: mt76: mt7996: reserve space for the CSA-abort co...
Keywords:
Status: NEW
Alias: CVE-2026-90366
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-17 16:40 UTC by OSIDB Bzimport
Modified: 2026-10-20 10:55 UTC (History)
17 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-09-17 16:40:47 UTC 
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.
Comment 1 gkamathe 2026-09-22 08:01:48 UTC 
Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-90366.mbox
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