CVE-2026-89523

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89523", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.718Z", "datePublished": "2026-09-11T19:44:04.796Z", "dateUpdated": "2026-10-19T08:48:14.517Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:48:14.517Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: mt7925: cancel pending mlo_pm_work\n\nIf the device is reset, suspended or unregistered within that window,\nthe pending work can still run and access vif/bss data that may already\nbe freed, or send MCU commands while the firmware is not available.\n\nAdd cancel_delayed_work_sync(&dev->mlo_pm_work) in all relevant teardown\nand suspend paths:\n\n - mt7925_mac_reset_work() (chip reset recovery)\n - mt7925e_unregister_device() (PCIe unbind)\n - mt7925_pci_suspend() (PCIe bus suspend)\n - mt7925_suspend() (mac80211 suspend)\n - mt7925u_suspend() (USB bus / runtime suspend)\n\nThis ensures the work is stopped before the device state becomes\ninvalid."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The bug leaves mlo_pm_work armed across local mt7925 teardown: chip-reset recovery, PCI unbind, and PCIe/mac80211/USB suspend. Those are host driver-lifecycle and power-management paths; over-the-air frames do not invoke them, matching other mt76 cleanup UAFs.\nAC:L - mt7925 queues mlo_pm_work with a fixed 5-second delay during MLO power-save setup. A local attacker who associates to a Wi-Fi 7 MLO AP and then immediately suspends, unbinds, or resets the device controls both sides and easily hits that window, with no attacker-uncontrollable race or heap layout.\nPR:L - MLO association uses nl80211 connect (GENL_UNS_ADMIN_PERM/CAP_NET_ADMIN). Logged-in users can then suspend via logind/polkit or Android autosleep, and NetworkManager/Android Wi-Fi controls expose this without init-namespace root, so privileges are Low.\nUI:N - The attacker performs MLO association and the subsequent suspend, PCI/USB unbind, or reset themselves. No separate victim action such as opening a file or mounting a filesystem is required.\nS:U - The use-after-free is of host kernel vif/bss_conf objects and the mt792x_dev-embedded delayed_work inside the mt7925 driver. It does not cross a VM, IOMMU, or sandbox security boundary.\nC:H - PCI/USB unbind runs ieee80211_unregister_hw, which destroys the phy workqueue, then mt76_free_device() frees the mt792x_dev that embeds mlo_pm_work while the 5s timer still points at them. The worker also dereferences vif/bss_conf that remove_interface or change_vif_links may already have freed, enabling disclosure via heap reclaim.\nI:H - The dangling delayed_work timer can fire on a freed mt792x_dev after unbind, and mt7925_mlo_pm_iter can send MCU BSS_INFO_UPDATE through stale mconf/vif objects. That is a classic timer/workqueue UAF exploitable for writes and control-flow hijack, so Integrity is High.\nA:H - The pending worker can WARN in __queue_work on a destroying phy workqueue, NULL-dereference a removed MLO link_conf, or issue MCU commands while firmware is reset or suspended, causing a kernel oops or panic. Any such crash is Availability High."}]}], "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", "drivers/net/wireless/mediatek/mt76/mt7925/main.c", "drivers/net/wireless/mediatek/mt76/mt7925/pci.c", "drivers/net/wireless/mediatek/mt76/mt7925/usb.c"], "versions": [{"version": "276a568832577c81ec90b62dc506bbdc3781ca46", "lessThan": "5be6d02837d418bc6c805b5cab1b338de6de9ca7", "status": "affected", "versionType": "git"}, {"version": "276a568832577c81ec90b62dc506bbdc3781ca46", "lessThan": "c5e073f2fbfd34d22099a50d96f60990799753e2", "status": "affected", "versionType": "git"}, {"version": "276a568832577c81ec90b62dc506bbdc3781ca46", "lessThan": "2889e84282dda147f10b10d94cf0efd90a349c53", "status": "affected", "versionType": "git"}, {"version": "74eb79258bfd5f2ffe6d26a09c898992b2afa1ce", "status": "affected", "versionType": "git"}, {"version": "6.14.3", "lessThan": "6.15", "status": "affected", "versionType": "semver"}]}, {"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", "drivers/net/wireless/mediatek/mt76/mt7925/main.c", "drivers/net/wireless/mediatek/mt76/mt7925/pci.c", "drivers/net/wireless/mediatek/mt76/mt7925/usb.c"], "versions": [{"version": "6.15", "status": "affected"}, {"version": "0", "lessThan": "6.15", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.50", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.4", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "6.15", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15", "versionEndExcluding": "7.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/5be6d02837d418bc6c805b5cab1b338de6de9ca7"}, {"url": "https://git.kernel.org/stable/c/c5e073f2fbfd34d22099a50d96f60990799753e2"}, {"url": "https://git.kernel.org/stable/c/2889e84282dda147f10b10d94cf0efd90a349c53"}], "title": "wifi: mt76: mt7925: cancel pending mlo_pm_work", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/net/wireless/mediatek/mt76/mt7925/mac.c", "drivers/net/wireless/mediatek/mt76/mt7925/main.c", "drivers/net/wireless/mediatek/mt76/mt7925/pci.c", "drivers/net/wireless/mediatek/mt76/mt7925/usb.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "5be6d02837d418bc6c805b5cab1b338de6de9ca7", "status": "affected", "version": "276a568832577c81ec90b62dc506bbdc3781ca46", "versionType": "git"}, {"lessThan": "c5e073f2fbfd34d22099a50d96f60990799753e2", "status": "affected", "version": "276a568832577c81ec90b62dc506bbdc3781ca46", "versionType": "git"}, {"lessThan": "2889e84282dda147f10b10d94cf0efd90a349c53", "status": "affected", "version": "276a568832577c81ec90b62dc506bbdc3781ca46", "versionType": "git"}, {"status": "affected", "version": "74eb79258bfd5f2ffe6d26a09c898992b2afa1ce", "versionType": "git"}, {"lessThan": "6.15", "status": "affected", "version": "6.14.3", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/net/wireless/mediatek/mt76/mt7925/mac.c", "drivers/net/wireless/mediatek/mt76/mt7925/main.c", "drivers/net/wireless/mediatek/mt76/mt7925/pci.c", "drivers/net/wireless/mediatek/mt76/mt7925/usb.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.15"}, {"lessThan": "6.15", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.50", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "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: cancel pending mlo_pm_work\n\nIf the device is reset, suspended or unregistered within that window,\nthe pending work can still run and access vif/bss data that may already\nbe freed, or send MCU commands while the firmware is not available.\n\nAdd cancel_delayed_work_sync(&dev->mlo_pm_work) in all relevant teardown\nand suspend paths:\n\n - mt7925_mac_reset_work() (chip reset recovery)\n - mt7925e_unregister_device() (PCIe unbind)\n - mt7925_pci_suspend() (PCIe bus suspend)\n - mt7925_suspend() (mac80211 suspend)\n - mt7925u_suspend() (USB bus / runtime suspend)\n\nThis ensures the work is stopped before the device state becomes\ninvalid."}], "id": "CVE-2026-89523", "lastModified": "2026-10-19T09:17:46.757", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-09-11T20:19:35.010", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2889e84282dda147f10b10d94cf0efd90a349c53"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5be6d02837d418bc6c805b5cab1b338de6de9ca7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c5e073f2fbfd34d22099a50d96f60990799753e2"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: MediaTek mt7925 Wi-Fi driver denial of service", "id": "2532372", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532372"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.2", "cvss3_scoring_vector": "CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-367", "details": ["A flaw was found in the Linux kernel's MediaTek mt7925 Wi-Fi driver. When the device is reset, suspended, or unregistered, a pending work item (`mlo_pm_work`) can continue to execute. This can lead to the work item accessing memory that has already been freed (a use-after-free vulnerability) or sending commands to unavailable firmware. The most significant consequence is a denial of service, which can cause system instability or crashes."], "name": "CVE-2026-89523", "public_date": "2026-09-11T19:44:04Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89523\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89523\nhttps://git.kernel.org/stable/c/2889e84282dda147f10b10d94cf0efd90a349c53\nhttps://git.kernel.org/stable/c/5be6d02837d418bc6c805b5cab1b338de6de9ca7\nhttps://git.kernel.org/stable/c/c5e073f2fbfd34d22099a50d96f60990799753e2"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[276a568832577c81ec90b62dc506bbdc3781ca46,5be6d02837d418bc6c805b5cab1b338de6de9ca7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[276a568832577c81ec90b62dc506bbdc3781ca46,c5e073f2fbfd34d22099a50d96f60990799753e2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5be6d02837d418bc6c805b5cab1b338de6de9ca7,2889e84282dda147f10b10d94cf0efd90a349c53)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "74eb79258bfd5f2ffe6d26a09c898992b2afa1ce"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.14.3,6.15)"}}], "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": "semver", "value": "6.15"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.15)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.50,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.4,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc1,*]"}}], "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": "2026-09-12T11:00:12.563502+00:00", "updated": "2026-09-15T06:15:13.687507+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}