GHSA-X63J-V2J2-M8FV
Vulnerability from github – Published: 2026-03-25 12:30 – Updated: 2026-04-23 21:31In the Linux kernel, the following vulnerability has been resolved:
ALSA: usb-audio: Use correct version for UAC3 header validation
The entry of the validators table for UAC3 AC header descriptor is defined with the wrong protocol version UAC_VERSION_2, while it should have been UAC_VERSION_3. This results in the validator never matching for actual UAC3 devices (protocol == UAC_VERSION_3), causing their header descriptors to bypass validation entirely. A malicious USB device presenting a truncated UAC3 header could exploit this to cause out-of-bounds reads when the driver later accesses unvalidated descriptor fields.
The bug was introduced in the same commit as the recently fixed UAC3 feature unit sub-type typo, and appears to be from the same copy-paste error when the UAC3 section was created from the UAC2 section.
{
"affected": [],
"aliases": [
"CVE-2026-23318"
],
"database_specific": {
"cwe_ids": [
"CWE-125"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-03-25T11:16:28Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usb-audio: Use correct version for UAC3 header validation\n\nThe entry of the validators table for UAC3 AC header descriptor is\ndefined with the wrong protocol version UAC_VERSION_2, while it should\nhave been UAC_VERSION_3. This results in the validator never matching\nfor actual UAC3 devices (protocol == UAC_VERSION_3), causing their\nheader descriptors to bypass validation entirely. A malicious USB\ndevice presenting a truncated UAC3 header could exploit this to cause\nout-of-bounds reads when the driver later accesses unvalidated\ndescriptor fields.\n\nThe bug was introduced in the same commit as the recently fixed UAC3\nfeature unit sub-type typo, and appears to be from the same copy-paste\nerror when the UAC3 section was created from the UAC2 section.",
"id": "GHSA-x63j-v2j2-m8fv",
"modified": "2026-04-23T21:31:16Z",
"published": "2026-03-25T12:30:22Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23318"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0dcd1ed96c03459cf14706885c9dd3c1fd8bd29f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1e5753ff4c2e86aa88516f97a224c90a3d0b133e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/499ffd15b00dc91ac95c28f76959dfb5cdcc84d5"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/54f9d645a5453d0bfece0c465d34aaf072ea99fa"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/82a7d0a1b88798de1a609130080ce0c65dd869e9"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8307d93e63d5f54ef10412d4db2dd551e920dee4"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a0c6ae2ea84528f198bf7fd0117f12fd0cf6d7cc"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d3904ca40515272681ae61ad6f561c24f190957f"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
"type": "CVSS_V3"
}
]
}
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