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CVE-2026-68193

wifi: mt76: mt7925: drop TXRX_NOTIFY on non-mmio buses

In the Linux kernel, the following vulnerability has been resolved:

wifi: mt76: mt7925: drop TXRX_NOTIFY on non-mmio buses

PKT_TYPE_TXRX_NOTIFY is an mmio-only event, but mt7925_rx_check() and
mt7925_queue_rx_skb() dispatch it to mt7925_mac_tx_free() on every bus.
mt7925_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 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:
   mt7925_mac_tx_free+0x58/0x350 [mt7925_common]
   mt7925_rx_check+0xe2/0x130 [mt7925_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").
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version c948b5da6bbec742b433138e3e3f9537a85af2e5
Version < 0c8c4cd0ca60b45c4b05a39e3769b8473d6836eb
Status affected
Version c948b5da6bbec742b433138e3e3f9537a85af2e5
Version < 9cb72f67e1502aabba51aab9ac04ae7c386ee194
Status affected
Version c948b5da6bbec742b433138e3e3f9537a85af2e5
Version < 9677e86a5f7d680fe280a5f8999bc57353e360d7
Status affected
Version c948b5da6bbec742b433138e3e3f9537a85af2e5
Version < feeff151c83e7f0ffcdedcad5343852d23d1f6e1
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 6.7
Status affected
Version 0
Version < 6.7
Status unaffected
Version <= 6.12.*
Version 6.12.101
Status unaffected
Version <= 6.18.*
Version 6.18.42
Status unaffected
Version <= 7.1.*
Version 7.1.6
Status unaffected
Version <= *
Version 7.2
Status unaffected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.2% 0.1
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
Es wurden noch keine Informationen zu CWE veröffentlicht.
https://git.kernel.org/stable/c/0c8c4cd0ca60b45c4b05a39e3769b8473d6836eb
https://git.kernel.org/stable/c/9cb72f67e1502aabba51aab9ac04ae7c386ee194
https://git.kernel.org/stable/c/9677e86a5f7d680fe280a5f8999bc57353e360d7
https://git.kernel.org/stable/c/feeff151c83e7f0ffcdedcad5343852d23d1f6e1