ghsa-625q-77gv-32cr
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
ALSA: us122l: Use snd_card_free_when_closed() at disconnection
The USB disconnect callback is supposed to be short and not too-long waiting. OTOH, the current code uses snd_card_free() at disconnection, but this waits for the close of all used fds, hence it can take long. It eventually blocks the upper layer USB ioctls, which may trigger a soft lockup.
An easy workaround is to replace snd_card_free() with snd_card_free_when_closed(). This variant returns immediately while the release of resources is done asynchronously by the card device release at the last close.
The loop of us122l->mmap_count check is dropped as well. The check is useless for the asynchronous operation with *_when_closed().
{
"affected": [],
"aliases": [
"CVE-2024-56532"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-12-27T14:15:32Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: us122l: Use snd_card_free_when_closed() at disconnection\n\nThe USB disconnect callback is supposed to be short and not too-long\nwaiting. OTOH, the current code uses snd_card_free() at\ndisconnection, but this waits for the close of all used fds, hence it\ncan take long. It eventually blocks the upper layer USB ioctls, which\nmay trigger a soft lockup.\n\nAn easy workaround is to replace snd_card_free() with\nsnd_card_free_when_closed(). This variant returns immediately while\nthe release of resources is done asynchronously by the card device\nrelease at the last close.\n\nThe loop of us122l-\u003emmap_count check is dropped as well. The check is\nuseless for the asynchronous operation with *_when_closed().",
"id": "GHSA-625q-77gv-32cr",
"modified": "2024-12-27T15:31:53Z",
"published": "2024-12-27T15:31:52Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-56532"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/020cbc4d7414f0962004213e2b7bc5cc607e9ec7"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2938dd2648522336133c151dd67bb9bf01cbd390"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/75f418b249d84021865eaa59515d3ed9b75ce4d6"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9a48bd2184b142c92a4e17eac074c61fcf975bc9"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9b27924dc8d7f8a8c35e521287d4ccb9a006e597"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9d5c530e4d70f64b1114f2cc29ac690ba7ac4a38"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b7df09bb348016943f56b09dcaafe221e3f73947"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/bc778ad3e495333eebda36fe91d5b2c93109cc16"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/bf0aa35a7cb8602cccf2387712114e836f65c154"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
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- Confirmed: The vulnerability is confirmed from an analyst perspective.
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- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.