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GHSA-2CMM-RM3G-HC7X

Vulnerability from github – Published: 2026-09-11 21:31 – Updated: 2026-09-13 09:32

Details

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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-89523"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-11T20:19:35Z",
    "severity": "HIGH"
  },
  "details": "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.",
  "id": "GHSA-2cmm-rm3g-hc7x",
  "modified": "2026-09-13T09:32:16Z",
  "published": "2026-09-11T21:31:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89523"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2889e84282dda147f10b10d94cf0efd90a349c53"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5be6d02837d418bc6c805b5cab1b338de6de9ca7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c5e073f2fbfd34d22099a50d96f60990799753e2"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

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

Vulnerability from cvelistv5 – Published: 2026-09-11 19:44 – Updated: 2026-09-13 06:30

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

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/5be6d02837d418bc6…
https://git.kernel.org/stable/c/c5e073f2fbfd34d22…
https://git.kernel.org/stable/c/2889e84282dda147f…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 276a568832577c81ec90b62dc506bbdc3781ca46 , < 5be6d02837d418bc6c805b5cab1b338de6de9ca7 (git) Affected: 276a568832577c81ec90b62dc506bbdc3781ca46 , < c5e073f2fbfd34d22099a50d96f60990799753e2 (git) Affected: 276a568832577c81ec90b62dc506bbdc3781ca46 , < 2889e84282dda147f10b10d94cf0efd90a349c53 (git) Affected: 74eb79258bfd5f2ffe6d26a09c898992b2afa1ce (git) Affected: 6.14.3 , < 6.15 (semver)
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)

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{
  "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",
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            },
            {
              "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": [
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          "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"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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