{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "3b1c256eb4aedfc71dd97d5951ccff824b41d628"
            },
            {
              "fixed": "ca27a81cd77b698e5eb586a011bee6800c7ee4bd"
            },
            {
              "fixed": "d62b55b7c7dc62887d7fd5648fb38f0bfaef53ae"
            },
            {
              "fixed": "0ace76e410d7f7d813b605825a3e593a79c3958f"
            },
            {
              "fixed": "1d067abcd37062426c59ec73dbc4e87a63f33fea"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.101"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.42"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64568.json"
  },
  "details": "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-\u003eu.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().",
  "id": "CVE-2026-64568",
  "modified": "2026-08-07T03:30:30.658571013Z",
  "published": "2026-08-05T08:08:06.625Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0ace76e410d7f7d813b605825a3e593a79c3958f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1d067abcd37062426c59ec73dbc4e87a63f33fea"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ca27a81cd77b698e5eb586a011bee6800c7ee4bd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d62b55b7c7dc62887d7fd5648fb38f0bfaef53ae"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64568.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64568"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "wifi: mac80211: fix unsol_bcast_probe_resp double free on alloc failure"
}