wifi: mac80211: avoid WARN in set_bitrate_mask when sdata not in driver
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: avoid WARN in set_bitrate_mask when sdata not in driver ieee80211_set_bitrate_mask() checks if the interface is running via ieee80211_sdata_running(), but it does not check if the interface is still present in the driver. When sdata is running but IEEE80211_SDATA_IN_DRIVER is not set, the call reaches drv_set_bitrate_mask() in driver-ops.h which hits wlan1: Failed check-sdata-in-driver check, flags: 0x0 WARNING: net/mac80211/driver-ops.h:884 at drv_set_bitrate_mask Syzkaller triggers this via wext SIOCSIWRATE ioctl. The Call Trace shows wext_ioctl_dispatch() in wext-core.c dispatching the ioctl, calling ioctl_standard_call() for SIOCSIWRATE, which calls cfg80211_wext_siwrate() in wext-compat.c. That builds a bitrate mask and calls rdev_set_bitrate_mask() which ends up in ieee80211_set_bitrate_mask() in cfg.c. The interface is marked running via SDATA_STATE_RUNNING but flags is 0, so check_sdata_in_driver() fails. When the interface is being torn down, or when wext ioctl is issued during interface bringup before drv_add_interface() sets IN_DRIVER, the running check passes while IN_DRIVER is clear. Check IEEE80211_SDATA_IN_DRIVER in ieee80211_set_bitrate_mask() before calling the driver, returning -ENETDOWN. This avoids the WARN_ONCE in driver-ops.h and matches other cfg.c operations that bail early when not in driver. This change should be safe because wiphy mutex is held in cfg80211_wext_siwra
CVE-2026-98406
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-98406
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "554a43d5e77e8256aa9685ffd19ad555e6f77979",
"lessThan": "4ba86c44b2fcb1c3175caa2456b6d58f483446ab",
"versionType": "git"
},
{
"status": "affected",
"version": "554a43d5e77e8256aa9685ffd19ad555e6f77979",
"lessThan": "4095b66acae9893dd13deb39a4331651cb2f822b",
"versionType": "git"
},
{
"status": "affected",
"version": "554a43d5e77e8256aa9685ffd19ad555e6f77979",
"lessThan": "c2cd9c44777cf97be3e35c10b7c2d8f59ebb9306",
"versionType": "git"
},
{
"status": "affected",
"version": "554a43d5e77e8256aa9685ffd19ad555e6f77979",
"lessThan": "0d1700394e9f5d0bd9bebad8d5a50edf983f52fd",
"versionType": "git"
},
{
"status": "affected",
"version": "554a43d5e77e8256aa9685ffd19ad555e6f77979",
"lessThan": "7978dda63d2b109ea9c3f7a096cd1aac6542cd54",
"versionType": "git"
},
{
"status": "affected",
"version": "554a43d5e77e8256aa9685ffd19ad555e6f77979",
"lessThan": "432c8532d5ccc2af77da43ed6ef1c80495a4efe8",
"versionType": "git"
},
{
"status": "affected",
"version": "554a43d5e77e8256aa9685ffd19ad555e6f77979",
"lessThan": "c4ee5685af444024e6222ce29f6ed36adc44ffc3",
"versionType": "git"
},
{
"status": "affected",
"version": "554a43d5e77e8256aa9685ffd19ad555e6f77979",
"lessThan": "da2ca406f45a6e21760243152ed8d2e8e72915c2",
"versionType": "git"
}
],
"programFiles": [
"net/mac80211/cfg.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.5"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.5",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.271",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.222",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.189",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.158",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.112",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.54",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.8",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/mac80211/cfg.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98406
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #38470 · Revision 1
- Added to Heist Feed
- Publisher date