{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "3b1c256eb4aedfc71dd97d5951ccff824b41d628"
            },
            {
              "fixed": "e2c55079155a953db669ca1986a985fa286bad95"
            },
            {
              "fixed": "5baaa1042f71dd4b8e418f2cdd516808702d229b"
            },
            {
              "fixed": "1981fba71797ec95e6755fb882cad88899a2a84f"
            },
            {
              "fixed": "286e52a799fa158bdbd77da1426c4d93f9a6e7ad"
            }
          ],
          "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-2026-64570.json"
  },
  "details": "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-\u003eu.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().",
  "id": "CVE-2026-64570",
  "modified": "2026-08-09T03:30:33.872544601Z",
  "published": "2026-08-05T08:08:07.855Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1981fba71797ec95e6755fb882cad88899a2a84f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/286e52a799fa158bdbd77da1426c4d93f9a6e7ad"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5baaa1042f71dd4b8e418f2cdd516808702d229b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e2c55079155a953db669ca1986a985fa286bad95"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64570.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64570"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "wifi: mac80211: fix fils_discovery double free on alloc failure"
}