In the Linux kernel, the following vulnerability has been resolved:
wifi: mt76: mt7925: prevent NULL pointer dereference in mt7925_sta_set_decap_offload()
Add a NULL check for msta->vif before accessing its members to prevent a kernel panic in AP mode deployment. This also fix the issue reported in [1].
The crash occurs when this function is triggered before the station is fully initialized. The call trace shows a page fault at mt7925_sta_set_decap_offload() due to accessing resources when msta->vif is NULL.
Fix this by adding an early return if msta->vif is NULL and also check wcid.sta is ready. This ensures we only proceed with decap offload configuration when the station's state is properly initialized.
[14739.655703] Unable to handle kernel paging request at virtual address ffffffffffffffa0 [14739.811820] CPU: 0 UID: 0 PID: 895854 Comm: hostapd Tainted: G [14739.821394] Tainted: [C]=CRAP, [O]=OOT_MODULE [14739.825746] Hardware name: Raspberry Pi 4 Model B Rev 1.1 (DT) [14739.831577] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) [14739.838538] pc : mt7925_sta_set_decap_offload+0xc0/0x1b8 [mt7925_common] [14739.845271] lr : mt7925_sta_set_decap_offload+0x58/0x1b8 [mt7925_common] [14739.851985] sp : ffffffc085efb500 [14739.855295] x29: ffffffc085efb500 x28: 0000000000000000 x27: ffffff807803a158 [14739.862436] x26: ffffff8041ececb8 x25: 0000000000000001 x24: 0000000000000001 [14739.869577] x23: 0000000000000001 x22: 0000000000000008 x21: ffffff8041ecea88 [14739.876715] x20: ffffff8041c19ca0 x19: ffffff8078031fe0 x18: 0000000000000000 [14739.883853] x17: 0000000000000000 x16: ffffffe2aeac1110 x15: 000000559da48080 [14739.890991] x14: 0000000000000001 x13: 0000000000000000 x12: 0000000000000000 [14739.898130] x11: 0a10020001008e88 x10: 0000000000001a50 x9 : ffffffe26457bfa0 [14739.905269] x8 : ffffff8042013bb0 x7 : ffffff807fb6cbf8 x6 : dead000000000100 [14739.912407] x5 : dead000000000122 x4 : ffffff80780326c8 x3 : 0000000000000000 [14739.919546] x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffffff8041ececb8 [14739.926686] Call trace: [14739.929130] mt7925_sta_set_decap_offload+0xc0/0x1b8 [mt7925_common] [14739.935505] ieee80211_check_fast_rx+0x19c/0x510 [mac80211] [14739.941344] _sta_info_move_state+0xe4/0x510 [mac80211] [14739.946860] sta_info_move_state+0x1c/0x30 [mac80211] [14739.952116] sta_apply_auth_flags.constprop.0+0x90/0x1b0 [mac80211] [14739.958708] sta_apply_parameters+0x234/0x5e0 [mac80211] [14739.964332] ieee80211_add_station+0xdc/0x190 [mac80211] [14739.969950] nl80211_new_station+0x46c/0x670 [cfg80211] [14739.975516] genl_family_rcv_msg_doit+0xdc/0x150 [14739.980158] genl_rcv_msg+0x218/0x298 [14739.983830] netlink_rcv_skb+0x64/0x138 [14739.987670] genl_rcv+0x40/0x60 [14739.990816] netlink_unicast+0x314/0x380 [14739.994742] netlink_sendmsg+0x198/0x3f0 [14739.998664] __sock_sendmsg+0x64/0xc0 [14740.002324] ____sys_sendmsg+0x260/0x298 [14740.006242] ___sys_sendmsg+0xb4/0x110
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Jul 23, 2026 | Jul 23, 2026 |
| Redhat_linux | — | No solution exists | Jul 31, 2025 | Jul 25, 2025 |
| Suse | — | Upgrade dtb-amazonUpgrade dtb-exynosUpgrade gfs2-kmp-rtUpgrade dtb-renesasUpgrade dtb-hisiliconUpgrade kernel-default-livepatch-develUpgrade dtb-broadcomUpgrade dtb-freescaleUpgrade ocfs2-kmp-rtUpgrade ocfs2-kmp-defaultUpgrade dtb-apmUpgrade kernel-64kbUpgrade kernel-64kb-optionalUpgrade kernel-sourceUpgrade kernel-obs-qaUpgrade kernel-symsUpgrade ocfs2-kmp-64kbUpgrade dtb-lgUpgrade kernel-source-vanillaUpgrade dtb-caviumUpgrade dtb-socionextUpgrade dtb-marvellUpgrade kernel-default-develUpgrade kernel-default-extraUpgrade dtb-allwinnerUpgrade kselftests-kmp-64kbUpgrade kernel-default-livepatchUpgrade gfs2-kmp-64kbUpgrade dtb-alteraUpgrade kernel-kvmsmall-develUpgrade kernel-rt-livepatch-develUpgrade dlm-kmp-64kbUpgrade kernel-rt-optionalUpgrade kernel-kvmsmall-vdsoUpgrade dtb-amlogicUpgrade kernel-zfcpdumpUpgrade dtb-amdUpgrade kernel-64kb-develUpgrade kernel-docs-htmlUpgrade kernel-kvmsmallUpgrade dtb-appleUpgrade kernel-macrosUpgrade kernel-docsUpgrade kernel-obs-buildUpgrade kernel-defaultUpgrade gfs2-kmp-defaultUpgrade kernel-rt-extraUpgrade cluster-md-kmp-defaultUpgrade kernel-rt-develUpgrade kernel-rtUpgrade kernel-rt-livepatchUpgrade kselftests-kmp-defaultUpgrade cluster-md-kmp-rtUpgrade dtb-xilinxUpgrade kernel-default-optionalUpgrade dtb-sprdUpgrade dtb-rockchipUpgrade dtb-qcomUpgrade kselftests-kmp-rtUpgrade dtb-armUpgrade dlm-kmp-rtUpgrade kernel-default-vdsoUpgrade kernel-64kb-extraUpgrade kernel-develUpgrade dtb-nvidiaUpgrade dtb-mediatekUpgrade dlm-kmp-defaultUpgrade kernel-rt-vdsoUpgrade cluster-md-kmp-64kb | Dec 5, 2025 | Nov 6, 2025 |
| Ubuntu | — | Upgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-awsUpgrade linux-image-generic-64k-6.14Upgrade linux-image-6.14.0-1017-azureUpgrade linux-image-6.14.0-1016-oemUpgrade linux-image-6.14.0-36-generic-64kUpgrade linux-image-6.14.0-1017-aws-64kUpgrade linux-image-6.14.0-1017-oracleUpgrade linux-image-realtimeUpgrade linux-image-oracle-6.14Upgrade linux-image-6.14.0-1020-gcpUpgrade linux-image-oem-6.14Upgrade linux-image-realtime-6.14Upgrade linux-image-6.14.0-1020-gcp-64kUpgrade linux-image-oracleUpgrade linux-image-6.14.0-36-genericUpgrade linux-image-gcp-64k-6.14Upgrade linux-image-gcp-64kUpgrade linux-image-oracle-64k-6.14Upgrade linux-image-aws-64kUpgrade linux-image-virtualUpgrade linux-image-oem-24.04Upgrade linux-image-gcpUpgrade linux-image-virtual-6.14Upgrade linux-image-realtime-hwe-24.04Upgrade linux-image-6.14.0-1018-raspiUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-raspi-6.14Upgrade linux-image-azure-6.14Upgrade linux-image-azureUpgrade linux-image-aws-64k-6.14Upgrade linux-image-6.14.0-1016-realtimeUpgrade linux-image-aws-6.14Upgrade linux-image-gcp-6.14Upgrade linux-image-oem-24.04aUpgrade linux-image-6.14.0-1017-oracle-64kUpgrade linux-image-generic-6.14Upgrade linux-image-raspiUpgrade linux-image-oracle-64kUpgrade linux-image-generic-64kUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-genericUpgrade linux-image-6.14.0-1017-aws | Jul 31, 2025 | Jul 25, 2025 |
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