{"api_version":"1","generated_at":"2026-08-15T08:44:18+00:00","cve":"CVE-2026-74409","urls":{"html":"https://cve.report/CVE-2026-74409","api":"https://cve.report/api/cve/CVE-2026-74409.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-74409","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74409"},"summary":{"title":"wifi: rtw89: add bounds check on firmware mac_id in link lookup","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-15 06:22:42","updated_at":"2026-08-15 06:22:42"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/ad445de67359f24088d4305c05fbd7e34c4e35e3","name":"https://git.kernel.org/stable/c/ad445de67359f24088d4305c05fbd7e34c4e35e3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6d88244bb129755acca696f9227200f4a2d106a6","name":"https://git.kernel.org/stable/c/6d88244bb129755acca696f9227200f4a2d106a6","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/920101305e7601a33b9e01019f4ca526af2526ae","name":"https://git.kernel.org/stable/c/920101305e7601a33b9e01019f4ca526af2526ae","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74409","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74409","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 144c6cd24b3556e6e7a14271cee57a42ebf97450 ad445de67359f24088d4305c05fbd7e34c4e35e3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 144c6cd24b3556e6e7a14271cee57a42ebf97450 920101305e7601a33b9e01019f4ca526af2526ae git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 144c6cd24b3556e6e7a14271cee57a42ebf97450 6d88244bb129755acca696f9227200f4a2d106a6 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.14","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.14 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.40 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.5 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/net/wireless/realtek/rtw89/core.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"ad445de67359f24088d4305c05fbd7e34c4e35e3","status":"affected","version":"144c6cd24b3556e6e7a14271cee57a42ebf97450","versionType":"git"},{"lessThan":"920101305e7601a33b9e01019f4ca526af2526ae","status":"affected","version":"144c6cd24b3556e6e7a14271cee57a42ebf97450","versionType":"git"},{"lessThan":"6d88244bb129755acca696f9227200f4a2d106a6","status":"affected","version":"144c6cd24b3556e6e7a14271cee57a42ebf97450","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/net/wireless/realtek/rtw89/core.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.14"},{"lessThan":"6.14","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.40","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.5","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.40","versionStartIncluding":"6.14","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.5","versionStartIncluding":"6.14","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc1","versionStartIncluding":"6.14","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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."}],"providerMetadata":{"dateUpdated":"2026-08-15T05:59:17.361Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/ad445de67359f24088d4305c05fbd7e34c4e35e3"},{"url":"https://git.kernel.org/stable/c/920101305e7601a33b9e01019f4ca526af2526ae"},{"url":"https://git.kernel.org/stable/c/6d88244bb129755acca696f9227200f4a2d106a6"}],"title":"wifi: rtw89: add bounds check on firmware mac_id in link lookup","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-74409","datePublished":"2026-08-15T05:59:17.361Z","dateReserved":"2026-08-15T05:44:03.892Z","dateUpdated":"2026-08-15T05:59:17.361Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-15 06:22:42","lastModifiedDate":"2026-08-15 06:22:42","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"74409","Ordinal":"1","Title":"wifi: rtw89: add bounds check on firmware mac_id in link lookup","CVE":"CVE-2026-74409","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"74409","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"wifi: rtw89: add bounds check on firmware mac_id in link lookup"}]}}}