{"api_version":"1","generated_at":"2026-08-07T15:58:30+00:00","cve":"CVE-2026-64568","urls":{"html":"https://cve.report/CVE-2026-64568","api":"https://cve.report/api/cve/CVE-2026-64568.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-64568","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-64568"},"summary":{"title":"wifi: mac80211: fix unsol_bcast_probe_resp double free on alloc failure","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: fix unsol_bcast_probe_resp double free on alloc failure\n\nieee80211_set_unsol_bcast_probe_resp() calls kfree_rcu() on the old\ntemplate before allocating the replacement. If the kzalloc() then fails,\nit returns -ENOMEM while link->u.ap.unsol_bcast_probe_resp still points\nat the object already queued for freeing. A later update or AP teardown\nre-queues that same rcu_head; the second free is caught by KASAN when the\nRCU sheaf is processed in softirq:\n\n  BUG: KASAN: double-free in rcu_free_sheaf (mm/slub.c:5850)\n  Free of addr ffff88800d06f300 by task exploit/145\n   ...\n   __rcu_free_sheaf_prepare (mm/slub.c:2634 mm/slub.c:2940)\n   rcu_free_sheaf (mm/slub.c:5850)\n   rcu_core (kernel/rcu/tree.c:2617 kernel/rcu/tree.c:2869)\n   handle_softirqs (kernel/softirq.c:622)\n  The buggy address belongs to the cache kmalloc-128 of size 128\n\nQueue the old object for kfree_rcu() only after the new one is published,\nmatching ieee80211_set_probe_resp() and ieee80211_set_s1g_short_beacon().","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-05 08:16:36","updated_at":"2026-08-05 08:16:36"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/0ace76e410d7f7d813b605825a3e593a79c3958f","name":"https://git.kernel.org/stable/c/0ace76e410d7f7d813b605825a3e593a79c3958f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d62b55b7c7dc62887d7fd5648fb38f0bfaef53ae","name":"https://git.kernel.org/stable/c/d62b55b7c7dc62887d7fd5648fb38f0bfaef53ae","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1d067abcd37062426c59ec73dbc4e87a63f33fea","name":"https://git.kernel.org/stable/c/1d067abcd37062426c59ec73dbc4e87a63f33fea","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ca27a81cd77b698e5eb586a011bee6800c7ee4bd","name":"https://git.kernel.org/stable/c/ca27a81cd77b698e5eb586a011bee6800c7ee4bd","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-64568","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64568","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3b1c256eb4aedfc71dd97d5951ccff824b41d628 ca27a81cd77b698e5eb586a011bee6800c7ee4bd git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3b1c256eb4aedfc71dd97d5951ccff824b41d628 d62b55b7c7dc62887d7fd5648fb38f0bfaef53ae git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3b1c256eb4aedfc71dd97d5951ccff824b41d628 0ace76e410d7f7d813b605825a3e593a79c3958f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3b1c256eb4aedfc71dd97d5951ccff824b41d628 1d067abcd37062426c59ec73dbc4e87a63f33fea git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.7","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.7 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.101 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.42 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.6 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc4 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"64568","cve":"CVE-2026-64568","epss":"0.001560000","percentile":"0.052580000","score_date":"2026-08-06","updated_at":"2026-08-07 00:14:19"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/mac80211/cfg.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"ca27a81cd77b698e5eb586a011bee6800c7ee4bd","status":"affected","version":"3b1c256eb4aedfc71dd97d5951ccff824b41d628","versionType":"git"},{"lessThan":"d62b55b7c7dc62887d7fd5648fb38f0bfaef53ae","status":"affected","version":"3b1c256eb4aedfc71dd97d5951ccff824b41d628","versionType":"git"},{"lessThan":"0ace76e410d7f7d813b605825a3e593a79c3958f","status":"affected","version":"3b1c256eb4aedfc71dd97d5951ccff824b41d628","versionType":"git"},{"lessThan":"1d067abcd37062426c59ec73dbc4e87a63f33fea","status":"affected","version":"3b1c256eb4aedfc71dd97d5951ccff824b41d628","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/mac80211/cfg.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.7"},{"lessThan":"6.7","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.101","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.42","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc4","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.101","versionStartIncluding":"6.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.42","versionStartIncluding":"6.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.6","versionStartIncluding":"6.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc4","versionStartIncluding":"6.7","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: fix unsol_bcast_probe_resp double free on alloc failure\n\nieee80211_set_unsol_bcast_probe_resp() calls kfree_rcu() on the old\ntemplate before allocating the replacement. If the kzalloc() then fails,\nit returns -ENOMEM while link->u.ap.unsol_bcast_probe_resp still points\nat the object already queued for freeing. A later update or AP teardown\nre-queues that same rcu_head; the second free is caught by KASAN when the\nRCU sheaf is processed in softirq:\n\n  BUG: KASAN: double-free in rcu_free_sheaf (mm/slub.c:5850)\n  Free of addr ffff88800d06f300 by task exploit/145\n   ...\n   __rcu_free_sheaf_prepare (mm/slub.c:2634 mm/slub.c:2940)\n   rcu_free_sheaf (mm/slub.c:5850)\n   rcu_core (kernel/rcu/tree.c:2617 kernel/rcu/tree.c:2869)\n   handle_softirqs (kernel/softirq.c:622)\n  The buggy address belongs to the cache kmalloc-128 of size 128\n\nQueue the old object for kfree_rcu() only after the new one is published,\nmatching ieee80211_set_probe_resp() and ieee80211_set_s1g_short_beacon()."}],"providerMetadata":{"dateUpdated":"2026-08-05T08:08:06.625Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/ca27a81cd77b698e5eb586a011bee6800c7ee4bd"},{"url":"https://git.kernel.org/stable/c/d62b55b7c7dc62887d7fd5648fb38f0bfaef53ae"},{"url":"https://git.kernel.org/stable/c/0ace76e410d7f7d813b605825a3e593a79c3958f"},{"url":"https://git.kernel.org/stable/c/1d067abcd37062426c59ec73dbc4e87a63f33fea"}],"title":"wifi: mac80211: fix unsol_bcast_probe_resp double free on alloc failure","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-64568","datePublished":"2026-08-05T08:08:06.625Z","dateReserved":"2026-07-19T15:36:31.797Z","dateUpdated":"2026-08-05T08:08:06.625Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-05 08:16:36","lastModifiedDate":"2026-08-05 08:16:36","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"64568","Ordinal":"1","Title":"wifi: mac80211: fix unsol_bcast_probe_resp double free on alloc ","CVE":"CVE-2026-64568","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"64568","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: fix unsol_bcast_probe_resp double free on alloc failure\n\nieee80211_set_unsol_bcast_probe_resp() calls kfree_rcu() on the old\ntemplate before allocating the replacement. If the kzalloc() then fails,\nit returns -ENOMEM while link->u.ap.unsol_bcast_probe_resp still points\nat the object already queued for freeing. A later update or AP teardown\nre-queues that same rcu_head; the second free is caught by KASAN when the\nRCU sheaf is processed in softirq:\n\n  BUG: KASAN: double-free in rcu_free_sheaf (mm/slub.c:5850)\n  Free of addr ffff88800d06f300 by task exploit/145\n   ...\n   __rcu_free_sheaf_prepare (mm/slub.c:2634 mm/slub.c:2940)\n   rcu_free_sheaf (mm/slub.c:5850)\n   rcu_core (kernel/rcu/tree.c:2617 kernel/rcu/tree.c:2869)\n   handle_softirqs (kernel/softirq.c:622)\n  The buggy address belongs to the cache kmalloc-128 of size 128\n\nQueue the old object for kfree_rcu() only after the new one is published,\nmatching ieee80211_set_probe_resp() and ieee80211_set_s1g_short_beacon().","Type":"Description","Title":"wifi: mac80211: fix unsol_bcast_probe_resp double free on alloc "}]}}}