{"id":"CVE-2026-90366","state":"PUBLISHED","title":"wifi: mt76: mt7996: reserve space for the CSA-abort countdown TLV","description":"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.","publishedAt":"2026-09-17T16:09:08.785Z","updatedAt":"2026-10-19T09:02:25.401Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"98686cd21624c75a043e96812beadddf4f6f48e5","status":"affected","lessThan":"1d348f96623ec20d700af7d4dfc00a74da6238ac","versionType":"git"},{"version":"98686cd21624c75a043e96812beadddf4f6f48e5","status":"affected","lessThan":"bc1d694a1ffe0062c3adf0db1d64ad54454398ec","versionType":"git"},{"version":"98686cd21624c75a043e96812beadddf4f6f48e5","status":"affected","lessThan":"45d8896e4cffffb2c6554ccbec6efe7a0d53166f","versionType":"git"},{"version":"98686cd21624c75a043e96812beadddf4f6f48e5","status":"affected","lessThan":"1a51aff0e048dc5b8252d65808b79939c942d6ec","versionType":"git"},{"version":"98686cd21624c75a043e96812beadddf4f6f48e5","status":"affected","lessThan":"50c66bab321140c49aa2ed779a3ec9d2f085b458","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/mediatek/mt76/mt7996/mcu.h"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.2","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.52","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.6","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/mediatek/mt76/mt7996/mcu.h"]}],"references":["https://git.kernel.org/stable/c/1d348f96623ec20d700af7d4dfc00a74da6238ac","https://git.kernel.org/stable/c/bc1d694a1ffe0062c3adf0db1d64ad54454398ec","https://git.kernel.org/stable/c/45d8896e4cffffb2c6554ccbec6efe7a0d53166f","https://git.kernel.org/stable/c/1a51aff0e048dc5b8252d65808b79939c942d6ec","https://git.kernel.org/stable/c/50c66bab321140c49aa2ed779a3ec9d2f085b458"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:34.582Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/90xxx/CVE-2026-90366.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-90366","state":"PUBLISHED","datePublished":"2026-09-17T16:09:08.785Z","dateUpdated":"2026-10-19T09:02:25.401Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-11T19:38:34.807Z"},"containers":{"cna":{"title":"wifi: mt76: mt7996: reserve space for the CSA-abort countdown TLV","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"98686cd21624c75a043e96812beadddf4f6f48e5","status":"affected","lessThan":"1d348f96623ec20d700af7d4dfc00a74da6238ac","versionType":"git"},{"version":"98686cd21624c75a043e96812beadddf4f6f48e5","status":"affected","lessThan":"bc1d694a1ffe0062c3adf0db1d64ad54454398ec","versionType":"git"},{"version":"98686cd21624c75a043e96812beadddf4f6f48e5","status":"affected","lessThan":"45d8896e4cffffb2c6554ccbec6efe7a0d53166f","versionType":"git"},{"version":"98686cd21624c75a043e96812beadddf4f6f48e5","status":"affected","lessThan":"1a51aff0e048dc5b8252d65808b79939c942d6ec","versionType":"git"},{"version":"98686cd21624c75a043e96812beadddf4f6f48e5","status":"affected","lessThan":"50c66bab321140c49aa2ed779a3ec9d2f085b458","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/mediatek/mt76/mt7996/mcu.h"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.2","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.52","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.6","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/mediatek/mt76/mt7996/mcu.h"]}],"references":[{"url":"https://git.kernel.org/stable/c/1d348f96623ec20d700af7d4dfc00a74da6238ac"},{"url":"https://git.kernel.org/stable/c/bc1d694a1ffe0062c3adf0db1d64ad54454398ec"},{"url":"https://git.kernel.org/stable/c/45d8896e4cffffb2c6554ccbec6efe7a0d53166f"},{"url":"https://git.kernel.org/stable/c/1a51aff0e048dc5b8252d65808b79939c942d6ec"},{"url":"https://git.kernel.org/stable/c/50c66bab321140c49aa2ed779a3ec9d2f085b458"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:02:25.401Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.6.157"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.12.110"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.18.52"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"7.2.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}