CAX 80 injecting malformed TCP RSTs

I have a CAX80 that appears to be actively interfering with and terminating encrypted TLS connections by injecting malformed TCP Reset (RST) packets. This occurs even with the following disabled: ...

cax80

FURRYe38

Guru - Experienced User

Feb 15, 2026

What FW version is loaded on the CAX80?

Is your laptop wireless or ethernet connected?

Brand and model# of the wireless or ethernet adapter on the laptop?

Drivers for adapters up to date?

Which ISP are you connected too?

Happens with a different PC or laptop?

Wireless configuration on the CAX80?

schplat

Aspirant

Feb 15, 2026

Oops, meant to reply to you, my reply is below. And seeing if the code blocks clean up:

$ sudo dmesg | grep iwl | grep -m 1 firmware
[ 5.046536] iwlwifi 0000:00:14.3: loaded firmware version 89.df9556fc.0 so-a0-gf-a0-89.ucode op_mode iwlmvm
$ modinfo iwlwifi | grep ^filename
filename: /lib/modules/6.18.7-arch1-1/kernel/drivers/net/wireless/intel/iwlwifi/iwlwifi.ko.zst

and

$ sudo lspci -v -s 00:14.3
00:14.3 Network controller: Intel Corporation Alder Lake-P PCH CNVi WiFi (rev 01)
	Subsystem: Intel Corporation Dual Band Wi-Fi 6E(802.11ax) AX211 160MHz 2x2 [Garfield Peak]
	Flags: bus master, fast devsel, latency 0, IRQ 16, IOMMU group 13
	Memory at 618d1d4000 (64-bit, non-prefetchable) [size=16K]
	Capabilities: [c8] Power Management version 3
	Capabilities: [d0] MSI: Enable- Count=1/1 Maskable- 64bit+
	Capabilities: [40] Express Root Complex Integrated Endpoint, IntMsgNum 0
	Capabilities: [80] MSI-X: Enable+ Count=16 Masked-
	Capabilities: [100] Latency Tolerance Reporting
	Capabilities: [164] Vendor Specific Information: ID=0010 Rev=0 Len=014 <?>
	Kernel driver in use: iwlwifi
	Kernel modules: iwlwifi

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CAX 80 injecting malformed TCP RSTs