CVE-2026-68193 (GCVE-0-2026-68193)
Vulnerability from cvelistv5
Published
2026-08-10 12:00
Modified
2026-08-17 05:00
Severity ?
VLAI Severity ?
EPSS score ?
Summary
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").
References
| URL | Tags | |
|---|---|---|
Impacted products
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/net/wireless/mediatek/mt76/mt7925/mac.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "0c8c4cd0ca60b45c4b05a39e3769b8473d6836eb",
"status": "affected",
"version": "c948b5da6bbec742b433138e3e3f9537a85af2e5",
"versionType": "git"
},
{
"lessThan": "9cb72f67e1502aabba51aab9ac04ae7c386ee194",
"status": "affected",
"version": "c948b5da6bbec742b433138e3e3f9537a85af2e5",
"versionType": "git"
},
{
"lessThan": "9677e86a5f7d680fe280a5f8999bc57353e360d7",
"status": "affected",
"version": "c948b5da6bbec742b433138e3e3f9537a85af2e5",
"versionType": "git"
},
{
"lessThan": "feeff151c83e7f0ffcdedcad5343852d23d1f6e1",
"status": "affected",
"version": "c948b5da6bbec742b433138e3e3f9537a85af2e5",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/net/wireless/mediatek/mt76/mt7925/mac.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.7"
},
{
"lessThan": "6.7",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.101",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.42",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.6",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.101",
"versionStartIncluding": "6.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.42",
"versionStartIncluding": "6.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.1.6",
"versionStartIncluding": "6.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.2",
"versionStartIncluding": "6.7",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: mt7925: drop TXRX_NOTIFY on non-mmio buses\n\nPKT_TYPE_TXRX_NOTIFY is an mmio-only event, but mt7925_rx_check() and\nmt7925_queue_rx_skb() dispatch it to mt7925_mac_tx_free() on every bus.\nmt7925_mac_tx_free() cleans the DMA tx queues with\nmt76_queue_tx_cleanup(), which calls queue_ops-\u003etx_cleanup(). Only the\nmmio queue ops implement that callback; on USB it is NULL, so a\nTXRX_NOTIFY there calls a NULL pointer in the RX worker:\n\n BUG: kernel NULL pointer dereference, address: 0000000000000000\n RIP: 0010:0x0\n Call Trace:\n mt7925_mac_tx_free+0x58/0x350 [mt7925_common]\n mt7925_rx_check+0xe2/0x130 [mt7925_common]\n mt76u_rx_worker+0x1b9/0x620 [mt76_usb]\n\nDrop the event on non-mmio buses via mt76_is_mmio(), as in\ncommit 5683e1488aa9 (\"wifi: mt76: connac: do not check WED status for\nnon-mmio devices\")."
}
],
"providerMetadata": {
"dateUpdated": "2026-08-17T05:00:36.015Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/0c8c4cd0ca60b45c4b05a39e3769b8473d6836eb"
},
{
"url": "https://git.kernel.org/stable/c/9cb72f67e1502aabba51aab9ac04ae7c386ee194"
},
{
"url": "https://git.kernel.org/stable/c/9677e86a5f7d680fe280a5f8999bc57353e360d7"
},
{
"url": "https://git.kernel.org/stable/c/feeff151c83e7f0ffcdedcad5343852d23d1f6e1"
}
],
"title": "wifi: mt76: mt7925: drop TXRX_NOTIFY on non-mmio buses",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-68193",
"datePublished": "2026-08-10T12:00:11.110Z",
"dateReserved": "2026-07-30T09:28:09.373Z",
"dateUpdated": "2026-08-17T05:00:36.015Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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