{"id":"CVE-2026-74409","summary":"wifi: rtw89: add bounds check on firmware mac_id in link lookup","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rtw89: add bounds check on firmware mac_id in link lookup\n\nThe mac_id field in RX descriptors is 8 bits wide (0-255), but\nassoc_link_on_macid[] has only RTW89_MAX_MAC_ID_NUM (128) entries.\nWhile the driver currently assigns mac_id values below 128, the\ndescriptor value comes from firmware and is not validated before use\nas an array index. Add a defensive bounds check in\nrtw89_assoc_link_rcu_dereference() to guard against out-of-range\nfirmware values.","modified":"2026-08-16T03:48:35.033984808Z","published":"2026-08-15T05:59:17.361Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74409.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/6d88244bb129755acca696f9227200f4a2d106a6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/920101305e7601a33b9e01019f4ca526af2526ae"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ad445de67359f24088d4305c05fbd7e34c4e35e3"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74409.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74409"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"144c6cd24b3556e6e7a14271cee57a42ebf97450"},{"fixed":"ad445de67359f24088d4305c05fbd7e34c4e35e3"},{"fixed":"920101305e7601a33b9e01019f4ca526af2526ae"},{"fixed":"6d88244bb129755acca696f9227200f4a2d106a6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74409.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.14.0"},{"fixed":"6.18.40"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74409.json"}}],"schema_version":"1.9.0"}