CVE-2026-68193

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-68193", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-30T09:28:09.373Z", "datePublished": "2026-08-10T12:00:11.110Z", "dateUpdated": "2026-08-17T05:00:36.015Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:00:36.015Z"}, "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->tx_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\")."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/wireless/mediatek/mt76/mt7925/mac.c"], "versions": [{"version": "c948b5da6bbec742b433138e3e3f9537a85af2e5", "lessThan": "0c8c4cd0ca60b45c4b05a39e3769b8473d6836eb", "status": "affected", "versionType": "git"}, {"version": "c948b5da6bbec742b433138e3e3f9537a85af2e5", "lessThan": "9cb72f67e1502aabba51aab9ac04ae7c386ee194", "status": "affected", "versionType": "git"}, {"version": "c948b5da6bbec742b433138e3e3f9537a85af2e5", "lessThan": "9677e86a5f7d680fe280a5f8999bc57353e360d7", "status": "affected", "versionType": "git"}, {"version": "c948b5da6bbec742b433138e3e3f9537a85af2e5", "lessThan": "feeff151c83e7f0ffcdedcad5343852d23d1f6e1", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/wireless/mediatek/mt76/mt7925/mac.c"], "versions": [{"version": "6.7", "status": "affected"}, {"version": "0", "lessThan": "6.7", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.101", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.42", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.6", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.12.101"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.18.42"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "7.1.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "7.2"}]}]}], "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"}}}}

{}

{"affected": [{"affectedData": [{"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"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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->tx_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\")."}], "id": "CVE-2026-68193", "lastModified": "2026-08-17T05:18:21.147", "metrics": {}, "published": "2026-08-10T13:20:06.667", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0c8c4cd0ca60b45c4b05a39e3769b8473d6836eb"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9677e86a5f7d680fe280a5f8999bc57353e360d7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9cb72f67e1502aabba51aab9ac04ae7c386ee194"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/feeff151c83e7f0ffcdedcad5343852d23d1f6e1"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: mt76/mt7925 Wi-Fi driver NULL pointer dereference leads to denial of service", "id": "2513386", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2513386"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.3", "cvss3_scoring_vector": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nwifi: mt76: mt7925: drop TXRX_NOTIFY on non-mmio buses\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->tx_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:\nBUG: kernel NULL pointer dereference, address: 0000000000000000\nRIP: 0010:0x0\nCall Trace:\nmt7925_mac_tx_free+0x58/0x350 [mt7925_common]\nmt7925_rx_check+0xe2/0x130 [mt7925_common]\nmt76u_rx_worker+0x1b9/0x620 [mt76_usb]\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\").", "A flaw was found in the Linux kernel. The mt7925 Wi-Fi driver incorrectly dispatches a memory-mapped I/O (MMIO) specific event to non-MMIO buses, such as USB. This improper handling leads to a NULL pointer dereference when attempting to clean up DMA transmit queues. A remote attacker could exploit this vulnerability by sending specially crafted Wi-Fi packets, causing a system crash and resulting in a denial of service."], "name": "CVE-2026-68193", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:enterprise_linux_nvidia:", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux for NVIDIA 26"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "rhcos", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-08-10T12:00:11Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-68193\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-68193\nhttps://git.kernel.org/stable/c/0c8c4cd0ca60b45c4b05a39e3769b8473d6836eb\nhttps://git.kernel.org/stable/c/9677e86a5f7d680fe280a5f8999bc57353e360d7\nhttps://git.kernel.org/stable/c/9cb72f67e1502aabba51aab9ac04ae7c386ee194\nhttps://git.kernel.org/stable/c/feeff151c83e7f0ffcdedcad5343852d23d1f6e1"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c948b5da6bbec742b433138e3e3f9537a85af2e5,0c8c4cd0ca60b45c4b05a39e3769b8473d6836eb)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c948b5da6bbec742b433138e3e3f9537a85af2e5,9cb72f67e1502aabba51aab9ac04ae7c386ee194)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c948b5da6bbec742b433138e3e3f9537a85af2e5,9677e86a5f7d680fe280a5f8999bc57353e360d7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c948b5da6bbec742b433138e3e3f9537a85af2e5,feeff151c83e7f0ffcdedcad5343852d23d1f6e1)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "6.7"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.7)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.101,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.42,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.6,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc5,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-10T14:30:04.128318+00:00", "updated": "2026-08-13T07:30:06.736552+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}