{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "397a7a24ef8c2967a3e8090013f9c54714110c48"
            },
            {
              "fixed": "0d2619e708e2ef02ba1c91642ea261d3f19d8f9a"
            },
            {
              "fixed": "659a81b62a61440b85e02c09903be861ae7679e5"
            },
            {
              "fixed": "aa01ef0ebbc3289154229ef58e65baf289eb9789"
            },
            {
              "fixed": "be9dfcb0654c1f6c0fce7ba2a909683bb6f1e0ef"
            },
            {
              "fixed": "962f755a47d7ec3bbf6c709697d7f4c5f798441d"
            },
            {
              "fixed": "a424985c3ef2a87ce6057a853e18d0c441a86be8"
            },
            {
              "fixed": "4b8abf43bf34791c99d99dc3be13f897adefc461"
            },
            {
              "fixed": "f3858d5b1432098c1936e03d6e03dd0e33facf60"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.9.0"
            },
            {
              "fixed": "5.10.265"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.216"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.183"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.148"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "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/2026/68xxx/CVE-2026-68405.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: free AP_VLAN bc_buf SKBs outside IRQ lock\n\nieee80211_do_stop() removes AP_VLAN packets from the parent AP\nps-\u003ebc_buf while holding ps-\u003ebc_buf.lock with IRQs disabled. It then\ncalls ieee80211_free_txskb() before dropping the lock.\n\nieee80211_free_txskb() is not just a passive SKB release. For SKBs with\nTX status state it can report a dropped frame through cfg80211/nl80211,\nand that path can reach netlink tap transmit. This is the same reason\nthe pending queue cleanup in ieee80211_do_stop() already unlinks SKBs\nunder the queue lock and frees them after IRQ state is restored.\n\nThe buggy scenario involves two paths, with each column showing the\norder within that path:\n\nAP_VLAN management TX:             AP_VLAN stop:\n1. attach ACK-status state         1. clear the running state\n2. queue a multicast SKB on        2. take ps-\u003ebc_buf.lock with IRQs\n   parent ps-\u003ebc_buf                  disabled\n                                   3. unlink the AP_VLAN SKB\n                                   4. call ieee80211_free_txskb()\n\nUnlink matching AP_VLAN SKBs from ps-\u003ebc_buf under the existing lock,\nbut move them to a local free queue. Drop the lock and restore IRQ state\nbefore calling ieee80211_free_txskb().\n\nWARNING: kernel/softirq.c:430 at __local_bh_enable_ip",
  "id": "CVE-2026-68405",
  "modified": "2026-08-21T03:30:35.174311685Z",
  "published": "2026-08-10T12:04:25.241Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0d2619e708e2ef02ba1c91642ea261d3f19d8f9a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4b8abf43bf34791c99d99dc3be13f897adefc461"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/659a81b62a61440b85e02c09903be861ae7679e5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/962f755a47d7ec3bbf6c709697d7f4c5f798441d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a424985c3ef2a87ce6057a853e18d0c441a86be8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/aa01ef0ebbc3289154229ef58e65baf289eb9789"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/be9dfcb0654c1f6c0fce7ba2a909683bb6f1e0ef"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f3858d5b1432098c1936e03d6e03dd0e33facf60"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68405.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68405"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "wifi: mac80211: free AP_VLAN bc_buf SKBs outside IRQ lock"
}