{"api_version":"1","generated_at":"2026-10-21T13:33:15+00:00","cve":"CVE-2026-98709","urls":{"html":"https://cve.report/CVE-2026-98709","api":"https://cve.report/api/cve/CVE-2026-98709.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-98709","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-98709"},"summary":{"title":"wifi: mac80211: count only matching reservations in reserved switch","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: count only matching reservations in reserved switch\n\nieee80211_vif_use_reserved_switch() validates a replacement by counting\nassigned links on ctx->replace_ctx and treating reservations too\nbroadly. A link can still be assigned to the old channel context while\nholding a reservation that belongs to a different replacement\noperation.\n\nThat can make the current replacement appear complete too early. If\nanother link finalizes first, the function can free the\nWILL_BE_REPLACED chanctx while the unmatched link and driver still use\nit, leading to a use-after-free in later beacon generation.\n\nRequire an in-place reservation to point at the current replacement\ncontext, and require the reserved and assigned contexts to be the\nmatching replacement pair, before counting or moving the link.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-10-18 16:17:24","updated_at":"2026-10-19 10:19:35"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/03525b632908b049f4d04cc8a71cdff2329589cf","name":"https://git.kernel.org/stable/c/03525b632908b049f4d04cc8a71cdff2329589cf","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d31f655e44631891788ca67018ec5e1ed1c7de86","name":"https://git.kernel.org/stable/c/d31f655e44631891788ca67018ec5e1ed1c7de86","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/437f3727b4fd715266c296435c116288f82666fd","name":"https://git.kernel.org/stable/c/437f3727b4fd715266c296435c116288f82666fd","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5cc54a000960bc88f8c58940164dca0e601ab39c","name":"https://git.kernel.org/stable/c/5cc54a000960bc88f8c58940164dca0e601ab39c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98709","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98709","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f d31f655e44631891788ca67018ec5e1ed1c7de86 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f 03525b632908b049f4d04cc8a71cdff2329589cf git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f 5cc54a000960bc88f8c58940164dca0e601ab39c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f 437f3727b4fd715266c296435c116288f82666fd git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3.17","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 3.17 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.113 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.56 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.10 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3 * 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":["net/mac80211/chan.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"d31f655e44631891788ca67018ec5e1ed1c7de86","status":"affected","version":"5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f","versionType":"git"},{"lessThan":"03525b632908b049f4d04cc8a71cdff2329589cf","status":"affected","version":"5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f","versionType":"git"},{"lessThan":"5cc54a000960bc88f8c58940164dca0e601ab39c","status":"affected","version":"5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f","versionType":"git"},{"lessThan":"437f3727b4fd715266c296435c116288f82666fd","status":"affected","version":"5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/mac80211/chan.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"3.17"},{"lessThan":"3.17","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.113","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.56","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.10","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.113","versionStartIncluding":"3.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.56","versionStartIncluding":"3.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.10","versionStartIncluding":"3.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3","versionStartIncluding":"3.17","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: count only matching reservations in reserved switch\n\nieee80211_vif_use_reserved_switch() validates a replacement by counting\nassigned links on ctx->replace_ctx and treating reservations too\nbroadly. A link can still be assigned to the old channel context while\nholding a reservation that belongs to a different replacement\noperation.\n\nThat can make the current replacement appear complete too early. If\nanother link finalizes first, the function can free the\nWILL_BE_REPLACED chanctx while the unmatched link and driver still use\nit, leading to a use-after-free in later beacon generation.\n\nRequire an in-place reservation to point at the current replacement\ncontext, and require the reserved and assigned contexts to be the\nmatching replacement pair, before counting or moving the link."}],"providerMetadata":{"dateUpdated":"2026-10-19T09:24:20.531Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/d31f655e44631891788ca67018ec5e1ed1c7de86"},{"url":"https://git.kernel.org/stable/c/03525b632908b049f4d04cc8a71cdff2329589cf"},{"url":"https://git.kernel.org/stable/c/5cc54a000960bc88f8c58940164dca0e601ab39c"},{"url":"https://git.kernel.org/stable/c/437f3727b4fd715266c296435c116288f82666fd"}],"title":"wifi: mac80211: count only matching reservations in reserved switch","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-98709","datePublished":"2026-10-18T15:46:39.290Z","dateReserved":"2026-09-25T10:25:14.365Z","dateUpdated":"2026-10-19T09:24:20.531Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-18 16:17:24","lastModifiedDate":"2026-10-19 10:19:35","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"98709","Ordinal":"1","Title":"wifi: mac80211: count only matching reservations in reserved swi","CVE":"CVE-2026-98709","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"98709","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: count only matching reservations in reserved switch\n\nieee80211_vif_use_reserved_switch() validates a replacement by counting\nassigned links on ctx->replace_ctx and treating reservations too\nbroadly. A link can still be assigned to the old channel context while\nholding a reservation that belongs to a different replacement\noperation.\n\nThat can make the current replacement appear complete too early. If\nanother link finalizes first, the function can free the\nWILL_BE_REPLACED chanctx while the unmatched link and driver still use\nit, leading to a use-after-free in later beacon generation.\n\nRequire an in-place reservation to point at the current replacement\ncontext, and require the reserved and assigned contexts to be the\nmatching replacement pair, before counting or moving the link.","Type":"Description","Title":"wifi: mac80211: count only matching reservations in reserved swi"}]}}}