{"id":"CVE-2026-90349","state":"PUBLISHED","title":"wifi: mt76: mt7996: fix out-of-bounds link array access in mt7996_tx()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: mt7996: fix out-of-bounds link array access in mt7996_tx()\n\nWhen mac80211 leaves the link unspecified, mt7996_tx() substitutes the\nprimary link id of the station or vif. That value is\nIEEE80211_LINK_UNSPECIFIED (0xf) until the first link has been added,\nand it is then used unchecked to index vif->link_conf[],\nmvif->mt76.link[] and sta->link[], all of which hold\nIEEE80211_MLD_MAX_NUM_LINKS (15) entries.\n\nClamp the primary link id to the default link before using it, and use\nthe clamped value for the link_sta fallback as well.","publishedAt":"2026-09-17T16:08:57.539Z","updatedAt":"2026-10-19T09:02:06.019Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"1609b014aa29f9a2bf3aaa93f71de4a06725845e","status":"affected","lessThan":"637bb99cc766a858d744905e46638459ca128b6c","versionType":"git"},{"version":"1609b014aa29f9a2bf3aaa93f71de4a06725845e","status":"affected","lessThan":"aff81505a84d27f83b4db8e039e813930cb23c2c","versionType":"git"},{"version":"1609b014aa29f9a2bf3aaa93f71de4a06725845e","status":"affected","lessThan":"4330a0ef9f75a54fde3548432a9a698f06bab635","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/mediatek/mt76/mt7996/main.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.18","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/main.c"]}],"references":["https://git.kernel.org/stable/c/637bb99cc766a858d744905e46638459ca128b6c","https://git.kernel.org/stable/c/aff81505a84d27f83b4db8e039e813930cb23c2c","https://git.kernel.org/stable/c/4330a0ef9f75a54fde3548432a9a698f06bab635"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:34.582Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/90xxx/CVE-2026-90349.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-90349","state":"PUBLISHED","datePublished":"2026-09-17T16:08:57.539Z","dateUpdated":"2026-10-19T09:02:06.019Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-11T19:38:34.805Z"},"containers":{"cna":{"title":"wifi: mt76: mt7996: fix out-of-bounds link array access in mt7996_tx()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: mt7996: fix out-of-bounds link array access in mt7996_tx()\n\nWhen mac80211 leaves the link unspecified, mt7996_tx() substitutes the\nprimary link id of the station or vif. That value is\nIEEE80211_LINK_UNSPECIFIED (0xf) until the first link has been added,\nand it is then used unchecked to index vif->link_conf[],\nmvif->mt76.link[] and sta->link[], all of which hold\nIEEE80211_MLD_MAX_NUM_LINKS (15) entries.\n\nClamp the primary link id to the default link before using it, and use\nthe clamped value for the link_sta fallback as well."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"1609b014aa29f9a2bf3aaa93f71de4a06725845e","status":"affected","lessThan":"637bb99cc766a858d744905e46638459ca128b6c","versionType":"git"},{"version":"1609b014aa29f9a2bf3aaa93f71de4a06725845e","status":"affected","lessThan":"aff81505a84d27f83b4db8e039e813930cb23c2c","versionType":"git"},{"version":"1609b014aa29f9a2bf3aaa93f71de4a06725845e","status":"affected","lessThan":"4330a0ef9f75a54fde3548432a9a698f06bab635","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/mediatek/mt76/mt7996/main.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.18","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/main.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/637bb99cc766a858d744905e46638459ca128b6c"},{"url":"https://git.kernel.org/stable/c/aff81505a84d27f83b4db8e039e813930cb23c2c"},{"url":"https://git.kernel.org/stable/c/4330a0ef9f75a54fde3548432a9a698f06bab635"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:02:06.019Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18","versionEndExcluding":"6.18.52"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18","versionEndExcluding":"7.2.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}