CVE-2026-68194

CVE CVE-2026-68194EUVD EUVD-2026-55295Published 2026-08-10T12:00:12.000Z

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7921: drop TXRX_NOTIFY on non-mmio buses PKT_TYPE_TXRX_NOTIFY is an mmio-only event, but mt7921_rx_check() and mt7921_queue_rx_skb() dispatch it to mt7921_mac_tx_free() on every bus. mt7921_mac_tx_free() cleans the DMA tx queues with mt76_queue_tx_cleanup(), which calls queue_ops->tx_cleanup(). Only the mmio queue ops implement that callback; on USB and SDIO it is NULL, so a TXRX_NOTIFY there calls a NULL pointer in the RX worker: BUG: kernel NULL pointer dereference, address: 0000000000000000 RIP: 0010:0x0 Call Trace: mt7921_mac_tx_free+0x64/0x310 [mt7921_common] mt7921_rx_check+0x5f/0xf0 [mt7921_common] mt76u_rx_worker+0x1b9/0x620 [mt76_usb] Drop the event on non-mmio buses via mt76_is_mmio(), as in commit 5683e1488aa9 ("wifi: mt76: connac: do not check WED status for non-mmio devices").

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux patch: 0; patch: 6.12.101; patch: 6.6.148; patch: 7.2-rc5; 48fab5bbef4092d925ab3214773ad12e68807223 <ecf995b828191829ba4a87169bccabcbeb5c9c32; patch: 7.1.6; 48fab5bbef4092d925ab3214773ad12e68807223 <da4082e91acabc1498611ed8ccc53f0610baefc6; 48fab5bbef4092d925ab3214773ad12e68807223 <263816e92e8d66c81c98ccab2b5d2191ed08ec71; 5.16; patch: 6.18.42; 48fab5bbef4092d925ab3214773ad12e68807223 <24475d2ddc8d8dfd82f4d2be0d951401f86911a6; 48fab5bbef4092d925ab3214773ad12e68807223 <ef2ee5f820c3ef87643b51e960c20b4a14d8336b

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

Linux — Linux

Does this concern one of your customers?

This page cannot answer that — it does not know your estate. Whoever has recorded their environments gets the answer the morning after publication, together with a paragraph they can forward to the customer unedited.

Try it for 28 days

Patchlage reports hits and suspected hits. About everything else this system says nothing — neither this page nor the situation report ever claims that an estate is safe.