CVE-2026-90116 (GCVE-0-2026-90116)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:06 – Updated: 2026-09-17 16:06
VLAI
Title
ALSA: mtpav: shut down output timer before card teardown
Summary
In the Linux kernel, the following vulnerability has been resolved: ALSA: mtpav: shut down output timer before card teardown snd_mtpav_output_timer() rearms chip->timer while holding chip->spinlock and accesses the card-private mtpav state. snd_mtpav_free() currently takes the same lock and calls timer_delete() when the timer is active. This only removes a pending timer; it does not wait for a callback that is already running and does not prevent the callback from rearming the timer. A callback running on another CPU can therefore continue after snd_mtpav_free() releases the lock and access the card-private state while the card is being torn down. It can also rearm the timer after timer_delete() has returned. Call timer_shutdown_sync() without holding chip->spinlock. This waits for any running callback to finish and prevents further rearming before the card-private mtpav state is released.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 392c985c6b03dfdf4904c0d464f18735ca3c4df8 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 1e16e82581521a2fe20eda29bdc9e75286f7c950 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < c73cb5b7c159246dd572277c668851a56e516019 (git)
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Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 6.18.52 , ≤ 6.18.* (semver)
Unaffected: 7.2.6 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: mtpav: shut down output timer before card teardown\n\nsnd_mtpav_output_timer() rearms chip-\u003etimer while holding\nchip-\u003espinlock and accesses the card-private mtpav state.\n\nsnd_mtpav_free() currently takes the same lock and calls\ntimer_delete() when the timer is active. This only removes a\npending timer; it does not wait for a callback that is already\nrunning and does not prevent the callback from rearming the timer.\n\nA callback running on another CPU can therefore continue after\nsnd_mtpav_free() releases the lock and access the card-private\nstate while the card is being torn down. It can also rearm the\ntimer after timer_delete() has returned.\n\nCall timer_shutdown_sync() without holding chip-\u003espinlock. This\nwaits for any running callback to finish and prevents further\nrearming before the card-private mtpav state is released."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-17T16:06:22.065Z",
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          "url": "https://git.kernel.org/stable/c/c73cb5b7c159246dd572277c668851a56e516019"
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      "title": "ALSA: mtpav: shut down output timer before card teardown",
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    "datePublished": "2026-09-17T16:06:22.065Z",
    "dateReserved": "2026-09-11T19:38:34.787Z",
    "dateUpdated": "2026-09-17T16:06:22.065Z",
    "state": "PUBLISHED"
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        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: mtpav: shut down output timer before card teardown\n\nsnd_mtpav_output_timer() rearms chip-\u003etimer while holding\nchip-\u003espinlock and accesses the card-private mtpav state.\n\nsnd_mtpav_free() currently takes the same lock and calls\ntimer_delete() when the timer is active. This only removes a\npending timer; it does not wait for a callback that is already\nrunning and does not prevent the callback from rearming the timer.\n\nA callback running on another CPU can therefore continue after\nsnd_mtpav_free() releases the lock and access the card-private\nstate while the card is being torn down. It can also rearm the\ntimer after timer_delete() has returned.\n\nCall timer_shutdown_sync() without holding chip-\u003espinlock. This\nwaits for any running callback to finish and prevents further\nrearming before the card-private mtpav state is released."
          }
        ],
        "id": "CVE-2026-90116",
        "lastModified": "2026-09-17T17:17:03.747",
        "metrics": {},
        "published": "2026-09-17T17:17:03.747",
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    }
  }
}



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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.

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  • 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.
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  • 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.



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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.