{"id":"CVE-2026-64570","revision":"ab26bf16f6614a1098a68e32d6ec97b7","records":[{"revision":"ab26bf16f6614a1098a68e32d6ec97b7","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-64570","aliases":[],"title":"wifi: mac80211: fix fils_discovery double free on alloc failure","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: fix fils_discovery double free on alloc failure\n\nieee80211_set_fils_discovery() calls kfree_rcu() on the old template\nbefore allocating the replacement. If the kzalloc() then fails, it\nreturns -ENOMEM while link->u.ap.fils_discovery still points at the\nobject already queued for freeing. A later update or AP teardown\n(ieee80211_stop_ap()) re-queues that same rcu_head; the second free is\ncaught by KASAN when the RCU sheaf is processed in softirq:\n\n  BUG: KASAN: double-free in rcu_free_sheaf (mm/slub.c:5850)\n  Free of addr ffff88800c065280 by task swapper/0/0\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-96 of size 96\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":0,"publishedAt":"2026-08-05T08:08:07.855+00:00","modifiedAt":"2026-10-19T20:48:42.361+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/mac80211/cfg.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"3b1c256eb4aedfc71dd97d5951ccff824b41d628\",\n                            \"lessThan\": \"e2c55079155a953db669ca1986a985fa286bad95\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3b1c256eb4aedfc71dd97d5951ccff824b41d628\",\n                            \"lessThan\": \"5baaa1042f71dd4b8e418f2cdd516808702d229b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3b1c256eb4aedfc71dd97d5951ccff824b41d628\",\n                            \"lessThan\": \"1981fba71797ec95e6755fb882cad88899a2a84f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3b1c256eb4aedfc71dd97d5951ccff824b41d628\",\n                            \"lessThan\": \"286e52a799fa158bdbd77da1426c4d93f9a6e7ad\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/mac80211/cfg.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.7\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.7\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.101\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.42\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.6\",\n                            \"lessThanOrEqual\": \"7.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/e2c55079155a953db669ca1986a985fa286bad95","https://git.kernel.org/stable/c/5baaa1042f71dd4b8e418f2cdd516808702d229b","https://git.kernel.org/stable/c/1981fba71797ec95e6755fb882cad88899a2a84f","https://git.kernel.org/stable/c/286e52a799fa158bdbd77da1426c4d93f9a6e7ad"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-64570","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-64570","identifiers":["CVE-2026-64570"]},"retained":false,"historicalAffected":[]}],"coverage":[]}