{ "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": "2026-10-14T13:27:41.192Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-14T13:27:41.192Z" }, "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-rc4", "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-rc4" } ] } ] } ], "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" } } } }