GHSA-F6XW-5HRW-VJ32
Vulnerability from github – Published: 2026-09-17 18:31 – Updated: 2026-09-17 18:31In 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.
{
"affected": [],
"aliases": [
"CVE-2026-90116"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-17T17:17:03Z",
"severity": null
},
"details": "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": "GHSA-f6xw-5hrw-vj32",
"modified": "2026-09-17T18:31:51Z",
"published": "2026-09-17T18:31:51Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90116"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1e16e82581521a2fe20eda29bdc9e75286f7c950"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/392c985c6b03dfdf4904c0d464f18735ca3c4df8"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c73cb5b7c159246dd572277c668851a56e516019"
}
],
"schema_version": "1.4.0",
"severity": []
}
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