CVE-2026-68193wifi: mt76: mt7925: drop TXRX_NOTIFY on non-mmio buses
- —Not scoredno CVSS score yet
- 0.21%Exploitation in 30 daysEPSS · top 89% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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").
Timeline
ID reserved
By Linux
- 11 days later
· 11 days later
Published
- 7 days later
· 7 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.21% · top 89% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected c948b5da6bbec742b433138e3e3f9537a85af2e5 – < 0c8c4cd0ca60b45c4b05a39e3769b8473d6836eb
- affected c948b5da6bbec742b433138e3e3f9537a85af2e5 – < 9cb72f67e1502aabba51aab9ac04ae7c386ee194
- affected c948b5da6bbec742b433138e3e3f9537a85af2e5 – < 9677e86a5f7d680fe280a5f8999bc57353e360d7
- affected c948b5da6bbec742b433138e3e3f9537a85af2e5 – < feeff151c83e7f0ffcdedcad5343852d23d1f6e1
- affected 6.7
- unaffected < 6.7
- unaffected 6.12.101 – ≤ 6.12.*
- unaffected 6.18.42 – ≤ 6.18.*
- unaffected 7.1.6 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References4
- https://git.kernel.org/stable/c/0c8c4cd0ca60b45c4b05a39e3769b8473d6836eb (opens in a new tab)
- https://git.kernel.org/stable/c/9cb72f67e1502aabba51aab9ac04ae7c386ee194 (opens in a new tab)
- https://git.kernel.org/stable/c/9677e86a5f7d680fe280a5f8999bc57353e360d7 (opens in a new tab)
- https://git.kernel.org/stable/c/feeff151c83e7f0ffcdedcad5343852d23d1f6e1 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-55294 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-68193)Record last updated .