{"id":"CVE-2026-98406","revision":"821a6a8e028443dbb46d5da20e53c5a7","records":[{"revision":"821a6a8e028443dbb46d5da20e53c5a7","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-98406","aliases":[],"title":"wifi: mac80211: avoid WARN in set_bitrate_mask when sdata not in driver","description":"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]","state":0,"publishedAt":"2026-10-14T13:27:41.192+00:00","modifiedAt":"2026-10-19T09:18:59.519+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/mac80211/cfg.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"554a43d5e77e8256aa9685ffd19ad555e6f77979\",\n                            \"lessThan\": \"4ba86c44b2fcb1c3175caa2456b6d58f483446ab\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"554a43d5e77e8256aa9685ffd19ad555e6f77979\",\n                            \"lessThan\": \"4095b66acae9893dd13deb39a4331651cb2f822b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"554a43d5e77e8256aa9685ffd19ad555e6f77979\",\n                            \"lessThan\": \"c2cd9c44777cf97be3e35c10b7c2d8f59ebb9306\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"554a43d5e77e8256aa9685ffd19ad555e6f77979\",\n                            \"lessThan\": \"0d1700394e9f5d0bd9bebad8d5a50edf983f52fd\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"554a43d5e77e8256aa9685ffd19ad555e6f77979\",\n                            \"lessThan\": \"7978dda63d2b109ea9c3f7a096cd1aac6542cd54\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"554a43d5e77e8256aa9685ffd19ad555e6f77979\",\n                            \"lessThan\": \"432c8532d5ccc2af77da43ed6ef1c80495a4efe8\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"554a43d5e77e8256aa9685ffd19ad555e6f77979\",\n                            \"lessThan\": \"c4ee5685af444024e6222ce29f6ed36adc44ffc3\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"554a43d5e77e8256aa9685ffd19ad555e6f77979\",\n                            \"lessThan\": \"da2ca406f45a6e21760243152ed8d2e8e72915c2\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/mac80211/cfg.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"3.5\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"3.5\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.271\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.222\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.189\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.158\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.112\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.54\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.8\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/4ba86c44b2fcb1c3175caa2456b6d58f483446ab","https://git.kernel.org/stable/c/4095b66acae9893dd13deb39a4331651cb2f822b","https://git.kernel.org/stable/c/c2cd9c44777cf97be3e35c10b7c2d8f59ebb9306","https://git.kernel.org/stable/c/0d1700394e9f5d0bd9bebad8d5a50edf983f52fd","https://git.kernel.org/stable/c/7978dda63d2b109ea9c3f7a096cd1aac6542cd54","https://git.kernel.org/stable/c/432c8532d5ccc2af77da43ed6ef1c80495a4efe8","https://git.kernel.org/stable/c/c4ee5685af444024e6222ce29f6ed36adc44ffc3","https://git.kernel.org/stable/c/da2ca406f45a6e21760243152ed8d2e8e72915c2"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98406","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-98406","identifiers":["CVE-2026-98406"]},"retained":false,"historicalAffected":[]}],"coverage":[]}