{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "86a2ea4134b48f6371103cfceb521bf2d2bf76cd"
            },
            {
              "fixed": "20a3fb5e1a95caa34896853ca17a50d21c754969"
            },
            {
              "fixed": "b3451e6971248250312ad32dd7f63cc9f0a925f5"
            },
            {
              "fixed": "d0e69d9afa59b93c30294eba89b1f15f69e91105"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.3.0"
            },
            {
              "fixed": "6.12.111"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.53"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93804.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: ibss: wait for in-flight TX on disconnect\n\nWhile leaving an IBSS in ieee80211_ibss_disconnect() mac80211 flushes\nstations, turns the carrier off and immediately tells the driver to\nleave as well. While there may be synchronize_net() in station flush\nand in this code later, packets can still be transmitted due to\ncross-CPU race conditions after carrier off is set.\nTherefore, it's possible for a race to happen where a TX to the\ndriver occurs while or after telling it to leave the IBSS. This can\nbe confusing to drivers, and in the case of iwlwifi leads to an\nattempt to use invalid queues.\n\nMove netif_carrier_off() to occur before sta_info_flush() during\nIBSS disconnect, and add synchronize_net() if flushing didn't,\nso that the synchronize_net() always happens between turning the\ncarrier off and telling the driver, avoiding this race.",
  "id": "CVE-2026-93804",
  "modified": "2026-09-27T03:30:21.802905609Z",
  "published": "2026-09-24T16:02:38.223Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/20a3fb5e1a95caa34896853ca17a50d21c754969"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b3451e6971248250312ad32dd7f63cc9f0a925f5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d0e69d9afa59b93c30294eba89b1f15f69e91105"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93804.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-93804"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "wifi: mac80211: ibss: wait for in-flight TX on disconnect"
}