In the Linux kernel, the following vulnerability has been resolved:
wifi: cfg80211: Add missing lock in cfg80211_check_and_end_cac()
Callers of wdev_chandef() must hold the wiphy mutex.
But the worker cfg80211_propagate_cac_done_wk() never takes the lock. Which triggers the warning below with the mesh_peer_connected_dfs test from hostapd and not (yet) released mac80211 code changes:
WARNING: CPU: 0 PID: 495 at net/wireless/chan.c:1552 wdev_chandef+0x60/0x165 Modules linked in: CPU: 0 UID: 0 PID: 495 Comm: kworker/u4:2 Not tainted 6.14.0-rc5-wt-g03960e6f9d47 #33 13c287eeabfe1efea01c0bcc863723ab082e17cf Workqueue: cfg80211 cfg80211_propagate_cac_done_wk Stack: 00000000 00000001 ffffff00 6093267c 00000000 6002ec30 6d577c50 60037608 00000000 67e8d108 6063717b 00000000 Call Trace: [<6002ec30>] ? _printk+0x0/0x98 [<6003c2b3>] show_stack+0x10e/0x11a [<6002ec30>] ? _printk+0x0/0x98 [<60037608>] dump_stack_lvl+0x71/0xb8 [<6063717b>] ? wdev_chandef+0x60/0x165 [<6003766d>] dump_stack+0x1e/0x20 [<6005d1b7>] __warn+0x101/0x20f [<6005d3a8>] warn_slowpath_fmt+0xe3/0x15d [<600b0c5c>] ? mark_lock.part.0+0x0/0x4ec [<60751191>] ? __this_cpu_preempt_check+0x0/0x16 [<600b11a2>] ? mark_held_locks+0x5a/0x6e [<6005d2c5>] ? warn_slowpath_fmt+0x0/0x15d [<60052e53>] ? unblock_signals+0x3a/0xe7 [<60052f2d>] ? um_set_signals+0x2d/0x43 [<60751191>] ? __this_cpu_preempt_check+0x0/0x16 [<607508b2>] ? lock_is_held_type+0x207/0x21f [<6063717b>] wdev_chandef+0x60/0x165 [<605f89b4>] regulatory_propagate_dfs_state+0x247/0x43f [<60052f00>] ? um_set_signals+0x0/0x43 [<605e6bfd>] cfg80211_propagate_cac_done_wk+0x3a/0x4a [<6007e460>] process_scheduled_works+0x3bc/0x60e [<6007d0ec>] ? move_linked_works+0x4d/0x81 [<6007d120>] ? assign_work+0x0/0xaa [<6007f81f>] worker_thread+0x220/0x2dc [<600786ef>] ? set_pf_worker+0x0/0x57 [<60087c96>] ? to_kthread+0x0/0x43 [<6008ab3c>] kthread+0x2d3/0x2e2 [<6007f5ff>] ? worker_thread+0x0/0x2dc [<6006c05b>] ? calculate_sigpending+0x0/0x56 [<6003b37d>] new_thread_handler+0x4a/0x64 irq event stamp: 614611 hardirqs last enabled at (614621): [<00000000600bc96b>] __up_console_sem+0x82/0xaf hardirqs last disabled at (614630): [<00000000600bc92c>] __up_console_sem+0x43/0xaf softirqs last enabled at (614268): [<00000000606c55c6>] __ieee80211_wake_queue+0x933/0x985 softirqs last disabled at (614266): [<00000000606c52d6>] __ieee80211_wake_queue+0x643/0x985
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade kernel-modules-extra-commonUpgrade kernel-libbpf-staticUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-livepatch-6.1.164-196.303Upgrade bpftoolUpgrade kernel-libbpf-debuginfoUpgrade kernel-toolsUpgrade perfUpgrade perf-debuginfoUpgrade kernel-tools-debuginfoUpgrade python3-perf-debuginfoUpgrade python3-perfUpgrade kernel-libbpfUpgrade kernel-tools-develUpgrade kernel-develUpgrade kernelUpgrade bpftool-debuginfoUpgrade kernel-modules-extraUpgrade kernel-headersUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-debuginfoUpgrade kernel-libbpf-devel | Mar 27, 2026 | Aug 22, 2025 |
| Debian | — | Upgrade linux-6.1Upgrade linux | Mar 16, 2026 | Mar 16, 2026 |
| Oracle_linux | — | Upgrade kernel-uek | Jan 15, 2026 | Aug 22, 2025 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Aug 22, 2025 |
| Suse | — | Upgrade gfs2-kmp-defaultUpgrade kernel-rt_debugUpgrade dtb-hisiliconUpgrade kernel-source-azureUpgrade kernel-default-livepatch-develUpgrade kernel-symsUpgrade reiserfs-kmp-rtUpgrade kernel-rt-livepatchUpgrade dlm-kmp-defaultUpgrade dtb-alteraUpgrade cluster-md-kmp-rtUpgrade ocfs2-kmp-rtUpgrade kernel-develUpgrade dtb-caviumUpgrade kernel-default-develUpgrade dtb-mediatekUpgrade dtb-renesasUpgrade dtb-allwinnerUpgrade gfs2-kmp-64kbUpgrade dtb-appleUpgrade kernel-64kb-develUpgrade kernel-debug-develUpgrade gfs2-kmp-azureUpgrade kernel-azure-extraUpgrade kernel-docsUpgrade kernel-default-baseUpgrade kernel-64kb-optionalUpgrade dtb-apmUpgrade kernel-default-livepatchUpgrade dtb-armUpgrade dtb-socionextUpgrade dtb-xilinxUpgrade dtb-freescaleUpgrade kernel-obs-qaUpgrade kernel-kvmsmall-develUpgrade ocfs2-kmp-azureUpgrade dtb-lgUpgrade kselftests-kmp-rtUpgrade dtb-amdUpgrade kernel-64kb-extraUpgrade kernel-zfcpdumpUpgrade ocfs2-kmp-defaultUpgrade kernel-rt-develUpgrade kernel-devel-rtUpgrade kernel-debugUpgrade kernel-default-optionalUpgrade cluster-md-kmp-azureUpgrade dtb-amazonUpgrade kernel-64kbUpgrade kselftests-kmp-defaultUpgrade reiserfs-kmp-defaultUpgrade kernel-rt-vdsoUpgrade ocfs2-kmp-64kbUpgrade kselftests-kmp-azureUpgrade kernel-macrosUpgrade kernel-azure-develUpgrade kernel-sourceUpgrade kernel-default-base-rebuildUpgrade kernel-syms-azureUpgrade kernel-source-rtUpgrade kernel-rt-extraUpgrade kselftests-kmp-64kbUpgrade kernel-docs-htmlUpgrade cluster-md-kmp-defaultUpgrade kernel-kvmsmallUpgrade cluster-md-kmp-64kbUpgrade dlm-kmp-rtUpgrade dlm-kmp-azureUpgrade kernel-debug-vdsoUpgrade dtb-rockchipUpgrade dtb-qcomUpgrade kernel-azure-vdsoUpgrade kernel-kvmsmall-vdsoUpgrade kernel-devel-azureUpgrade kernel-rt_debug-develUpgrade kernel-rt-optionalUpgrade gfs2-kmp-rtUpgrade dtb-sprdUpgrade dtb-exynosUpgrade reiserfs-kmp-azureUpgrade kernel-rt_debug-vdsoUpgrade kernel-syms-rtUpgrade kernel-rtUpgrade kernel-default-extraUpgrade kernel-defaultUpgrade kernel-default-vdsoUpgrade kernel-azureUpgrade dtb-amlogicUpgrade dlm-kmp-64kbUpgrade kernel-source-vanillaUpgrade reiserfs-kmp-64kbUpgrade kernel-rt-livepatch-develUpgrade kernel-azure-optionalUpgrade dtb-marvellUpgrade dtb-broadcomUpgrade dtb-nvidiaUpgrade kernel-obs-build | Dec 5, 2025 | Oct 15, 2025 |
| Ubuntu | — | Upgrade linux-image-oem-22.04aUpgrade linux-image-intel-iotgUpgrade linux-image-lowlatency-6.8Upgrade linux-image-gke-6.8Upgrade linux-image-6.8.0-1050-aws-64kUpgrade linux-image-aws-fipsUpgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-oracle-lts-24.04Upgrade linux-image-lowlatency-64kUpgrade linux-image-6.8.0-1029-xilinxUpgrade linux-image-azure-6.14Upgrade linux-image-6.8.0-1047-oracleUpgrade linux-image-6.8.0-2040-raspi-realtimeUpgrade linux-image-generic-lpaeUpgrade linux-image-6.8.0-1049-nvidia-lowlatencyUpgrade linux-image-gcp-64k-6.14Upgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-6.8.0-1052-azure-fipsUpgrade linux-image-6.8.0-106-genericUpgrade linux-image-6.8.0-1052-gcp-64kUpgrade linux-image-raspi-realtime-6.8Upgrade linux-image-realtime-hwe-22.04Upgrade linux-image-azureUpgrade linux-image-oracle-64k-6.8Upgrade linux-image-6.14.0-1017-awsUpgrade linux-image-oem-22.04cUpgrade linux-image-oem-24.04Upgrade linux-image-6.8.1-1045-realtimeUpgrade linux-image-intel-iot-realtimeUpgrade linux-image-aws-64kUpgrade linux-image-gcp-fips-6.8Upgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-6.8.0-106-lowlatency-64kUpgrade linux-image-6.14.0-1017-oracle-64kUpgrade linux-image-azure-6.8Upgrade linux-image-virtual-hwe-24.04Upgrade linux-image-6.8.0-1048-gkeUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-raspiUpgrade linux-image-realtime-hwe-24.04Upgrade linux-image-xilinx-zynqmpUpgrade linux-image-gcp-64k-6.8Upgrade linux-image-aws-6.8Upgrade linux-image-raspi-6.14Upgrade linux-image-gkeUpgrade linux-image-nvidiaUpgrade linux-image-generic-64kUpgrade linux-image-gkeopUpgrade linux-image-6.8.0-1051-azureUpgrade linux-image-oem-22.04Upgrade linux-image-gkeop-6.8Upgrade linux-image-virtualUpgrade linux-image-lowlatencyUpgrade linux-image-nvidia-lowlatency-6.8Upgrade linux-image-genericUpgrade linux-image-6.8.0-1049-nvidiaUpgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-6.8.0-106-lowlatencyUpgrade linux-image-6.8.0-1035-gkeopUpgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-6.8.0-106-generic-64kUpgrade linux-image-6.14.0-1020-gcpUpgrade linux-image-6.8.0-1049-ibmUpgrade linux-image-nvidia-6.8Upgrade linux-image-ibmUpgrade linux-image-fipsUpgrade linux-image-oracle-6.14Upgrade linux-image-raspi-realtimeUpgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-6.14.0-1017-aws-64kUpgrade linux-image-realtime-6.14Upgrade linux-image-nvidia-64k-6.8Upgrade linux-image-generic-hwe-24.04Upgrade linux-image-generic-hwe-22.04Upgrade linux-image-generic-6.14Upgrade linux-image-fips-6.8Upgrade linux-image-oracle-64kUpgrade linux-image-azure-lts-24.04Upgrade linux-image-realtimeUpgrade linux-image-oem-24.04aUpgrade linux-image-oracle-6.8Upgrade linux-image-ibm-classicUpgrade linux-image-xilinxUpgrade linux-image-gcp-lts-24.04Upgrade linux-image-6.8.0-1049-nvidia-lowlatency-64kUpgrade linux-image-6.8.0-1050-raspiUpgrade linux-image-gcpUpgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-oracleUpgrade linux-image-nvidia-64kUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-azure-fips-6.8Upgrade linux-image-azure-fipsUpgrade linux-image-awsUpgrade linux-image-6.8.0-1052-gcpUpgrade linux-image-6.8.0-106-fipsUpgrade linux-image-6.8.0-1048-gke-64kUpgrade linux-image-nvidia-lowlatency-64k-6.8Upgrade linux-image-gke-64kUpgrade linux-image-gcp-fipsUpgrade linux-image-gcp-64kUpgrade linux-image-virtual-6.14Upgrade linux-image-ibm-lts-24.04Upgrade linux-image-gcp-6.8Upgrade linux-image-oem-22.04dUpgrade linux-image-generic-64k-6.8Upgrade linux-image-ibm-6.8Upgrade linux-image-aws-lts-24.04Upgrade linux-image-6.8.0-1050-awsUpgrade linux-image-6.8.0-1049-nvidia-64kUpgrade linux-image-oem-6.14Upgrade linux-image-nvidia-lowlatencyUpgrade linux-image-gcp-6.14Upgrade linux-image-realtime-6.8.1Upgrade linux-image-6.14.0-1016-oemUpgrade linux-image-aws-fips-6.8Upgrade linux-image-6.8.0-1050-aws-fipsUpgrade linux-image-virtual-6.8Upgrade linux-image-kvmUpgrade linux-image-6.8.0-1052-gcp-fipsUpgrade linux-image-gke-64k-6.8Upgrade linux-image-aws-64k-6.14Upgrade linux-image-6.14.0-36-generic-64kUpgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-6.14.0-1017-oracleUpgrade linux-image-6.14.0-36-genericUpgrade linux-image-generic-6.8Upgrade linux-image-aws-6.14Upgrade linux-image-6.14.0-1017-azureUpgrade linux-image-6.14.0-1016-realtimeUpgrade linux-image-xilinx-6.8Upgrade linux-image-oracle-64k-6.14Upgrade linux-image-oem-22.04bUpgrade linux-image-lowlatency-64k-6.8Upgrade linux-image-aws-64k-lts-24.04Upgrade linux-image-raspi-6.8Upgrade linux-image-generic-64k-6.14Upgrade linux-image-6.14.0-1020-gcp-64kUpgrade linux-image-6.14.0-1018-raspiUpgrade linux-image-aws-64k-6.8Upgrade linux-image-6.8.0-1047-oracle-64k | Nov 25, 2025 | Nov 21, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | Aug 22, 2025 |
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