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CVE-2026-80938 (GCVE-0-2026-80938)

Vulnerability from cvelistv5 – Published: 2026-09-11 19:42 – Updated: 2026-09-14 11:59
VLAI
Title
wifi: mt76: mt7615: avoid waiting for mac work under the mt76 mutex
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7615: avoid waiting for mac work under the mt76 mutex mt7615_suspend() acquired the mt76 mutex and then called cancel_delayed_work_sync() on mac_work. mt7615_mac_work() acquires the same mutex via mt7615_mutex_acquire() at the top of the worker, so if mac_work is already running and blocked on the mutex, the suspend path deadlocks waiting for the work it holds the mutex against. Flush scan_work and mac_work before taking the mutex, matching the suspend paths in mt7921 and mt7925. scan_work only takes the mt76 spinlock, but moving it keeps the sequence consistent. This also keeps mac_work from running over an already suspended HIF, which the previous split (async cancel under the lock, sync cancel after release) would have allowed.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: c6bf20109a3fae92402cb76ad709ec5256bcd169 , < 36c73b86a09f0e51c0f81a75c8945b6c5557ff27 (git)
Affected: c6bf20109a3fae92402cb76ad709ec5256bcd169 , < 33d29aeb4c0eede92622a7d04ea492b94c30f089 (git)
Affected: c6bf20109a3fae92402cb76ad709ec5256bcd169 , < ef2ec8b537c3a54e241d693bd03016f80d0d4484 (git)
Affected: c6bf20109a3fae92402cb76ad709ec5256bcd169 , < 3114d479f2a1d31b2e6214c395794c6e5715e579 (git)
Affected: c6bf20109a3fae92402cb76ad709ec5256bcd169 , < 4506e229b2e468b8c64bcf52c50c41a3bf2e633e (git)
Affected: c6bf20109a3fae92402cb76ad709ec5256bcd169 , < 44be85af3e1772ffb3332feafedad2a73b22854c (git)
Affected: c6bf20109a3fae92402cb76ad709ec5256bcd169 , < bda8324270b1ac91bfba1df8928e0570e29759e8 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.8
Unaffected: 0 , < 5.8 (semver)
Unaffected: 5.15.221 , ≤ 5.15.* (semver)
Unaffected: 6.1.188 , ≤ 6.1.* (semver)
Unaffected: 6.6.157 , ≤ 6.6.* (semver)
Unaffected: 6.12.109 , ≤ 6.12.* (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
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: mt7615: avoid waiting for mac work under the mt76 mutex\n\nmt7615_suspend() acquired the mt76 mutex and then called\ncancel_delayed_work_sync() on mac_work.  mt7615_mac_work() acquires the\nsame mutex via mt7615_mutex_acquire() at the top of the worker, so if\nmac_work is already running and blocked on the mutex, the suspend path\ndeadlocks waiting for the work it holds the mutex against.\n\nFlush scan_work and mac_work before taking the mutex, matching the\nsuspend paths in mt7921 and mt7925.  scan_work only takes the mt76\nspinlock, but moving it keeps the sequence consistent.  This also keeps\nmac_work from running over an already suspended HIF, which the previous\nsplit (async cancel under the lock, sync cancel after release) would\nhave allowed."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-14T11:59:02.208Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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    "dateReserved": "2026-08-26T14:34:25.803Z",
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    "state": "PUBLISHED"
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: mt7615: avoid waiting for mac work under the mt76 mutex\n\nmt7615_suspend() acquired the mt76 mutex and then called\ncancel_delayed_work_sync() on mac_work.  mt7615_mac_work() acquires the\nsame mutex via mt7615_mutex_acquire() at the top of the worker, so if\nmac_work is already running and blocked on the mutex, the suspend path\ndeadlocks waiting for the work it holds the mutex against.\n\nFlush scan_work and mac_work before taking the mutex, matching the\nsuspend paths in mt7921 and mt7925.  scan_work only takes the mt76\nspinlock, but moving it keeps the sequence consistent.  This also keeps\nmac_work from running over an already suspended HIF, which the previous\nsplit (async cancel under the lock, sync cancel after release) would\nhave allowed."
          }
        ],
        "id": "CVE-2026-80938",
        "lastModified": "2026-09-14T13:18:49.910",
        "metrics": {},
        "published": "2026-09-11T20:18:58.053",
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
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    "redhat_vex": {
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      "current_release_date": "2026-09-14T15:54:29+00:00",
      "cve": "CVE-2026-80938",
      "id": "CVE-2026-80938",
      "initial_release_date": "2026-09-11T00:00:00+00:00",
      "product_status:known_not_affected": "276",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: wifi: mt76: mt7615: avoid waiting for mac work under the mt76 mutex",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80938.json",
      "version": "3"
    },
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      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-15T01:06:02Z",
      "cve": "CVE-2026-80938",
      "id": "CVE-2026-80938",
      "initial_release_date": "2026-09-12T16:37:21Z",
      "product_status:known_affected": "152",
      "product_status:known_not_affected": "201",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-80938",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-80938.json",
      "version": "4"
    }
  }
}



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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

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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.


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