GHSA-9RJ4-WJX5-8XC6
Vulnerability from github – Published: 2026-09-17 18:32 – Updated: 2026-09-17 18:32In 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": [],
"aliases": [
"CVE-2026-90366"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-17T17:17:35Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: mt7996: reserve space for the CSA-abort countdown TLV\n\nWhen a CSA countdown is active, mt7996_mcu_beacon_cntdwn() emits two\nbss_bcn_cntdwn_tlv entries (the CSA countdown and the CCA-abort BCC), but\nMT7996_BEACON_UPDATE_SIZE only reserved one. With MBSSID enabled and a\nnear-maximum beacon template the extra 8 bytes could push the offload\ncommand past MT7996_MAX_BSS_OFFLOAD_SIZE and trigger skb_over_panic().\nReserve room for both countdown TLVs.",
"id": "GHSA-9rj4-wjx5-8xc6",
"modified": "2026-09-17T18:32:03Z",
"published": "2026-09-17T18:32:03Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90366"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1a51aff0e048dc5b8252d65808b79939c942d6ec"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1d348f96623ec20d700af7d4dfc00a74da6238ac"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/45d8896e4cffffb2c6554ccbec6efe7a0d53166f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/50c66bab321140c49aa2ed779a3ec9d2f085b458"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/bc1d694a1ffe0062c3adf0db1d64ad54454398ec"
}
],
"schema_version": "1.4.0",
"severity": []
}
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