CVE-2026-23318 (GCVE-0-2026-23318)
Vulnerability from cvelistv5
Published
2026-03-25 10:27
Modified
2026-04-18 08:57
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In 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.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: 57f8770620e9b51c61089751f0b5ad3dbe376ff2 Version: 57f8770620e9b51c61089751f0b5ad3dbe376ff2 Version: 57f8770620e9b51c61089751f0b5ad3dbe376ff2 Version: 57f8770620e9b51c61089751f0b5ad3dbe376ff2 Version: 57f8770620e9b51c61089751f0b5ad3dbe376ff2 Version: 57f8770620e9b51c61089751f0b5ad3dbe376ff2 Version: 57f8770620e9b51c61089751f0b5ad3dbe376ff2 Version: 57f8770620e9b51c61089751f0b5ad3dbe376ff2 Version: 17821e2fb16752f5d363fb5c3f8aab4df41b9bcc Version: bf74a46aebb1b5ab5e5f25bafa4ae0a453ba813a |
||
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"sound/usb/validate.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
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"versionType": "git"
},
{
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"versionType": "git"
},
{
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"status": "affected",
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"versionType": "git"
},
{
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"status": "affected",
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{
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}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"sound/usb/validate.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.4"
},
{
"lessThan": "5.4",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.253",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.203",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.167",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.130",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.77",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.17",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.19.*",
"status": "unaffected",
"version": "6.19.7",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.0",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.4",
"vulnerable": true
},
{
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},
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},
{
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{
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},
{
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},
{
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},
{
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},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.19.84",
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},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.3.11",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "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."
}
],
"providerMetadata": {
"dateUpdated": "2026-04-18T08:57:55.922Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/82a7d0a1b88798de1a609130080ce0c65dd869e9"
},
{
"url": "https://git.kernel.org/stable/c/8307d93e63d5f54ef10412d4db2dd551e920dee4"
},
{
"url": "https://git.kernel.org/stable/c/0dcd1ed96c03459cf14706885c9dd3c1fd8bd29f"
},
{
"url": "https://git.kernel.org/stable/c/a0c6ae2ea84528f198bf7fd0117f12fd0cf6d7cc"
},
{
"url": "https://git.kernel.org/stable/c/d3904ca40515272681ae61ad6f561c24f190957f"
},
{
"url": "https://git.kernel.org/stable/c/1e5753ff4c2e86aa88516f97a224c90a3d0b133e"
},
{
"url": "https://git.kernel.org/stable/c/499ffd15b00dc91ac95c28f76959dfb5cdcc84d5"
},
{
"url": "https://git.kernel.org/stable/c/54f9d645a5453d0bfece0c465d34aaf072ea99fa"
}
],
"title": "ALSA: usb-audio: Use correct version for UAC3 header validation",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-23318",
"datePublished": "2026-03-25T10:27:12.884Z",
"dateReserved": "2026-01-13T15:37:45.995Z",
"dateUpdated": "2026-04-18T08:57:55.922Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- 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.
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