{"id":"CVE-2026-90366","title":"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 …","summary":"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 …","severity":"medium","vendor":"Linux","product":"Linux","affected":["Linux >= 98686cd21624c75a043e96812beadddf4f6f48e5 < 1d348f96623ec20d700af7d4dfc00a74da6238ac","Linux >= 98686cd21624c75a043e96812beadddf4f6f48e5 < bc1d694a1ffe0062c3adf0db1d64ad54454398ec","Linux >= 98686cd21624c75a043e96812beadddf4f6f48e5 < 45d8896e4cffffb2c6554ccbec6efe7a0d53166f","Linux >= 98686cd21624c75a043e96812beadddf4f6f48e5 < 1a51aff0e048dc5b8252d65808b79939c942d6ec","Linux >= 98686cd21624c75a043e96812beadddf4f6f48e5 < 50c66bab321140c49aa2ed779a3ec9d2f085b458","Linux 6.2"],"published":"2026-09-17","updated":"2026-09-17","sourceUpdated":"2026-09-17T17:17:35.700","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90366","references":[{"url":"https://git.kernel.org/stable/c/1a51aff0e048dc5b8252d65808b79939c942d6ec","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/1d348f96623ec20d700af7d4dfc00a74da6238ac","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/45d8896e4cffffb2c6554ccbec6efe7a0d53166f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/50c66bab321140c49aa2ed779a3ec9d2f085b458","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/bc1d694a1ffe0062c3adf0db1d64ad54454398ec","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90366.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-90366"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2536146"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90366"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90366"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-90366.mbox"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ingestedAt":"2026-09-17T16:21:47.810Z","epss":0.00168,"epssPercentile":0.05989,"cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":["CWE-131"],"slug":"CVE-2026-90366","body":"## Overview\n\nIn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · updated 2026-10-20 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90366.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":225633,"id":"CVE-2026-90366","ts":1792498326579,"field":"cvss","old":null,"new":"5.5"},{"seq":225632,"id":"CVE-2026-90366","ts":1792498326579,"field":"severity","old":"none","new":"medium"}]}