{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "554a43d5e77e8256aa9685ffd19ad555e6f77979"
            },
            {
              "fixed": "4ba86c44b2fcb1c3175caa2456b6d58f483446ab"
            },
            {
              "fixed": "4095b66acae9893dd13deb39a4331651cb2f822b"
            },
            {
              "fixed": "c2cd9c44777cf97be3e35c10b7c2d8f59ebb9306"
            },
            {
              "fixed": "0d1700394e9f5d0bd9bebad8d5a50edf983f52fd"
            },
            {
              "fixed": "7978dda63d2b109ea9c3f7a096cd1aac6542cd54"
            },
            {
              "fixed": "432c8532d5ccc2af77da43ed6ef1c80495a4efe8"
            },
            {
              "fixed": "c4ee5685af444024e6222ce29f6ed36adc44ffc3"
            },
            {
              "fixed": "da2ca406f45a6e21760243152ed8d2e8e72915c2"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.5.0"
            },
            {
              "fixed": "5.10.271"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.222"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.189"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.158"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.112"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.54"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98406.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: avoid WARN in set_bitrate_mask when sdata not in driver\n\nieee80211_set_bitrate_mask() checks if the interface is running via\nieee80211_sdata_running(), but it does not check if the interface is\nstill present in the driver.\n\nWhen sdata is running but IEEE80211_SDATA_IN_DRIVER is not set, the\ncall reaches drv_set_bitrate_mask() in driver-ops.h which hits\n\n  wlan1: Failed check-sdata-in-driver check, flags: 0x0\n  WARNING: net/mac80211/driver-ops.h:884 at drv_set_bitrate_mask\n\nSyzkaller triggers this via wext SIOCSIWRATE ioctl. The Call Trace shows\nwext_ioctl_dispatch() in wext-core.c dispatching the ioctl, calling\nioctl_standard_call() for SIOCSIWRATE, which calls cfg80211_wext_siwrate()\nin wext-compat.c. That builds a bitrate mask and calls\nrdev_set_bitrate_mask() which ends up in ieee80211_set_bitrate_mask() in\ncfg.c. The interface is marked running via SDATA_STATE_RUNNING but\nflags is 0, so check_sdata_in_driver() fails.\n\nWhen the interface is being torn down, or when wext ioctl is issued\nduring interface bringup before drv_add_interface() sets IN_DRIVER, the\nrunning check passes while IN_DRIVER is clear.\n\nCheck IEEE80211_SDATA_IN_DRIVER in ieee80211_set_bitrate_mask() before\ncalling the driver, returning -ENETDOWN. This avoids the WARN_ONCE in\ndriver-ops.h and matches other cfg.c operations that bail early when not\nin driver.\n\nThis change should be safe because wiphy mutex is held in\ncfg80211_wext_siwrate() via guard(wiphy), and IN_DRIVER is set/cleared\nunder RTNL and wiphy paths in drv_add_interface() and\ndrv_remove_interface() in driver-ops.c, so the check is race-free\nagainst driver add/remove. Returning -ENETDOWN is the same error other\nnot-running paths use and does not introduce new locking.\n\n[also add second syzbot report]",
  "id": "CVE-2026-98406",
  "modified": "2026-10-15T02:31:12.988115063Z",
  "published": "2026-10-14T13:27:41.192Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0d1700394e9f5d0bd9bebad8d5a50edf983f52fd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4095b66acae9893dd13deb39a4331651cb2f822b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/432c8532d5ccc2af77da43ed6ef1c80495a4efe8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4ba86c44b2fcb1c3175caa2456b6d58f483446ab"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7978dda63d2b109ea9c3f7a096cd1aac6542cd54"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c2cd9c44777cf97be3e35c10b7c2d8f59ebb9306"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c4ee5685af444024e6222ce29f6ed36adc44ffc3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/da2ca406f45a6e21760243152ed8d2e8e72915c2"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98406.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98406"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "wifi: mac80211: avoid WARN in set_bitrate_mask when sdata not in driver"
}