{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98406","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-09-25T10:25:14.347Z","datePublished":"2026-10-14T13:27:41.192Z","dateUpdated":"2026-10-19T09:18:59.519Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-10-19T09:18:59.519Z"},"descriptions":[{"lang":"en","value":"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]"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/mac80211/cfg.c"],"versions":[{"version":"554a43d5e77e8256aa9685ffd19ad555e6f77979","lessThan":"4ba86c44b2fcb1c3175caa2456b6d58f483446ab","status":"affected","versionType":"git"},{"version":"554a43d5e77e8256aa9685ffd19ad555e6f77979","lessThan":"4095b66acae9893dd13deb39a4331651cb2f822b","status":"affected","versionType":"git"},{"version":"554a43d5e77e8256aa9685ffd19ad555e6f77979","lessThan":"c2cd9c44777cf97be3e35c10b7c2d8f59ebb9306","status":"affected","versionType":"git"},{"version":"554a43d5e77e8256aa9685ffd19ad555e6f77979","lessThan":"0d1700394e9f5d0bd9bebad8d5a50edf983f52fd","status":"affected","versionType":"git"},{"version":"554a43d5e77e8256aa9685ffd19ad555e6f77979","lessThan":"7978dda63d2b109ea9c3f7a096cd1aac6542cd54","status":"affected","versionType":"git"},{"version":"554a43d5e77e8256aa9685ffd19ad555e6f77979","lessThan":"432c8532d5ccc2af77da43ed6ef1c80495a4efe8","status":"affected","versionType":"git"},{"version":"554a43d5e77e8256aa9685ffd19ad555e6f77979","lessThan":"c4ee5685af444024e6222ce29f6ed36adc44ffc3","status":"affected","versionType":"git"},{"version":"554a43d5e77e8256aa9685ffd19ad555e6f77979","lessThan":"da2ca406f45a6e21760243152ed8d2e8e72915c2","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/mac80211/cfg.c"],"versions":[{"version":"3.5","status":"affected"},{"version":"0","lessThan":"3.5","status":"unaffected","versionType":"semver"},{"version":"5.10.271","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.222","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.189","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.158","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.112","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.54","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.8","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.5","versionEndExcluding":"5.10.271"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.5","versionEndExcluding":"5.15.222"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.5","versionEndExcluding":"6.1.189"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.5","versionEndExcluding":"6.6.158"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.5","versionEndExcluding":"6.12.112"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.5","versionEndExcluding":"6.18.54"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.5","versionEndExcluding":"7.2.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.5","versionEndExcluding":"7.3"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/4ba86c44b2fcb1c3175caa2456b6d58f483446ab"},{"url":"https://git.kernel.org/stable/c/4095b66acae9893dd13deb39a4331651cb2f822b"},{"url":"https://git.kernel.org/stable/c/c2cd9c44777cf97be3e35c10b7c2d8f59ebb9306"},{"url":"https://git.kernel.org/stable/c/0d1700394e9f5d0bd9bebad8d5a50edf983f52fd"},{"url":"https://git.kernel.org/stable/c/7978dda63d2b109ea9c3f7a096cd1aac6542cd54"},{"url":"https://git.kernel.org/stable/c/432c8532d5ccc2af77da43ed6ef1c80495a4efe8"},{"url":"https://git.kernel.org/stable/c/c4ee5685af444024e6222ce29f6ed36adc44ffc3"},{"url":"https://git.kernel.org/stable/c/da2ca406f45a6e21760243152ed8d2e8e72915c2"}],"title":"wifi: mac80211: avoid WARN in set_bitrate_mask when sdata not in driver","x_generator":{"engine":"bippy-1.2.0"}}}}