GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2026-89523 (GCVE-0-2026-89523)

Vulnerability from cvelistv5 – Published: 2026-09-11 19:44 – Updated: 2026-09-13 06:30
VLAI
Title
wifi: mt76: mt7925: cancel pending mlo_pm_work
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7925: cancel pending mlo_pm_work If the device is reset, suspended or unregistered within that window, the pending work can still run and access vif/bss data that may already be freed, or send MCU commands while the firmware is not available. Add cancel_delayed_work_sync(&dev->mlo_pm_work) in all relevant teardown and suspend paths: - mt7925_mac_reset_work() (chip reset recovery) - mt7925e_unregister_device() (PCIe unbind) - mt7925_pci_suspend() (PCIe bus suspend) - mt7925_suspend() (mac80211 suspend) - mt7925u_suspend() (USB bus / runtime suspend) This ensures the work is stopped before the device state becomes invalid.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 276a568832577c81ec90b62dc506bbdc3781ca46 , < 5be6d02837d418bc6c805b5cab1b338de6de9ca7 (git)
Affected: 276a568832577c81ec90b62dc506bbdc3781ca46 , < c5e073f2fbfd34d22099a50d96f60990799753e2 (git)
Affected: 276a568832577c81ec90b62dc506bbdc3781ca46 , < 2889e84282dda147f10b10d94cf0efd90a349c53 (git)
Affected: 74eb79258bfd5f2ffe6d26a09c898992b2afa1ce (git)
Affected: 6.14.3 , < 6.15 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 6.15
Unaffected: 0 , < 6.15 (semver)
Unaffected: 6.18.50 , ≤ 6.18.* (semver)
Unaffected: 7.2.4 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "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-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.50",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.4",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.14.3",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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(\u0026dev-\u003emlo_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": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "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."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-13T06:30:22.235Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "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"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89523",
    "datePublished": "2026-09-11T19:44:04.796Z",
    "dateReserved": "2026-09-11T19:38:34.718Z",
    "dateUpdated": "2026-09-13T06:30:22.235Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-89523",
      "date": "2026-09-17",
      "epss": "0.00136",
      "percentile": "0.03433"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-89523\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-09-11T20:19:35.010\",\"lastModified\":\"2026-09-13T07:17:14.697\",\"vulnStatus\":\"Received\",\"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(\u0026dev-\u003emlo_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.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"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\",\"versions\":[{\"version\":\"276a568832577c81ec90b62dc506bbdc3781ca46\",\"lessThan\":\"5be6d02837d418bc6c805b5cab1b338de6de9ca7\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"276a568832577c81ec90b62dc506bbdc3781ca46\",\"lessThan\":\"c5e073f2fbfd34d22099a50d96f60990799753e2\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"276a568832577c81ec90b62dc506bbdc3781ca46\",\"lessThan\":\"2889e84282dda147f10b10d94cf0efd90a349c53\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"74eb79258bfd5f2ffe6d26a09c898992b2afa1ce\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6.14.3\",\"lessThan\":\"6.15\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"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\",\"versions\":[{\"version\":\"6.15\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.15\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.50\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2.4\",\"lessThanOrEqual\":\"7.2.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.3-rc1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"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\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"references\":[{\"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\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-09-16T09:12:04+00:00",
      "cve": "CVE-2026-89523",
      "id": "CVE-2026-89523",
      "initial_release_date": "2026-09-11T00:00:00+00:00",
      "product_status:known_affected": "185",
      "product_status:known_not_affected": "91",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: wifi: mt76: mt7925: cancel pending mlo_pm_work",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89523.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-09-16T15:37:24Z",
      "cve": "CVE-2026-89523",
      "id": "CVE-2026-89523",
      "initial_release_date": "2026-09-12T16:26:53Z",
      "product_status:known_not_affected": "353",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-89523",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-89523.json",
      "version": "5"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.