UnratedFix available
USB: serial: mxuport: fix memory corruption with small endpoint
Type: advisorySources: OSV
In the Linux kernel, the following vulnerability has been resolved: USB: serial: mxuport: fix memory corruption with small endpoint Make sure that the bulk-out endpoint max packet size is at least eight bytes to avoid user-controlled slab corruption should a malicious device report a smaller size.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 5.10.259, 5.15.210, 6.1.176, 6.12.93, 6.18.35, 6.6.143, 7.0.12
- CVEs
- CVE-2026-63899
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 06:13 UTC · Revision 1
Source evidence
USB: serial: mxuport: fix memory corruption with small endpoint
core-osv · Original sourcePublished 19 Jul 2026, 14:55 UTC
In the Linux kernel, the following vulnerability has been resolved: USB: serial: mxuport: fix memory corruption with small endpoint Make sure that the bulk-out endpoint max packet size is at least eight bytes to avoid user-controlled slab corruption should a malicious device report a smaller size.
osv:CVE-2026-63899
Kernel
Fixed versions: 5.10.259, 5.15.210, 6.1.176, 6.6.143, 6.12.93, 6.18.35, 7.0.12
Complete source record
{
"id": "ea1ea7cd9e62bb12eda6ce0a43689626fdc2052d71811ff32a8a5426d09998ab",
"url": "https://osv.dev/vulnerability/CVE-2026-63899",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "USB: serial: mxuport: fix memory corruption with small endpoint",
"summary": "In the Linux kernel, the following vulnerability has been resolved: USB: serial: mxuport: fix memory corruption with small endpoint Make sure that the bulk-out endpoint max packet size is at least eight bytes to avoid user-controlled slab corruption should a malicious device report a smaller size.",
"evidence": "osv:CVE-2026-63899",
"products": [
{
"name": {
"value": "Kernel",
"evidence": "/affected/1/package/name"
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"prerequisites": [],
"fixed_versions": [
{
"value": "5.10.259",
"evidence": "/affected/1/ranges"
},
{
"value": "5.15.210",
"evidence": "/affected/1/ranges"
},
{
"value": "6.1.176",
"evidence": "/affected/1/ranges"
},
{
"value": "6.6.143",
"evidence": "/affected/1/ranges"
},
{
"value": "6.12.93",
"evidence": "/affected/1/ranges"
},
{
"value": "6.18.35",
"evidence": "/affected/1/ranges"
},
{
"value": "7.0.12",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
}
],
"severity": "unknown",
"structured": {
"id": "CVE-2026-63899",
"aliases": [
"CVE-2026-63899"
],
"affected": [
{
"ranges": [
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"type": "GIT",
"events": [
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{
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{
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{
"fixed": "ccbec56f2f9af008f1574335cc6a668f16603e47"
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{
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{
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}
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}
],
"database_specific": {
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}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "3.14.0"
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{
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{
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"events": [
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{
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{
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{
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},
{
"type": "ECOSYSTEM",
"events": [
{
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},
{
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]
},
{
"type": "ECOSYSTEM",
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{
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{
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]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.13.0"
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{
"fixed": "6.18.35"
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]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.19.0"
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{
"fixed": "7.0.12"
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]
}
],
"package": {
"name": "Kernel",
"ecosystem": "Linux"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63899.json"
}
}
],
"modified": "2026-11-01T02:31:01.070878092Z",
"provider": "osv",
"references": [
"https://git.kernel.org/stable/c/086b858b5f5125bc9d967ea2bd825f83d9f8f29d",
"https://git.kernel.org/stable/c/2f3661eb2446e1ef593da45e01a3b21a906768ec",
"https://git.kernel.org/stable/c/4085f0dbb1ce2251c9a5938d693de6593f0ab2bd",
"https://git.kernel.org/stable/c/6c0cf56f00f280d72180bb6ce79741bc787a6269",
"https://git.kernel.org/stable/c/b40166b4ef96067620a0f248e74ad9658c8f680c",
"https://git.kernel.org/stable/c/be3a1ed4ae51fa8dde57383277d336ce834f2cd9",
"https://git.kernel.org/stable/c/ccbec56f2f9af008f1574335cc6a668f16603e47",
"https://git.kernel.org/stable/c/e906545641d34fb1a09a65b4b5cfdff40eb09681",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63899.json",
"https://nvd.nist.gov/vuln/detail/CVE-2026-63899",
"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
],
"provider_metadata": {
"cna_assigner": "Linux",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63899.json"
}
},
"related_cves": [
{
"value": "CVE-2026-63899",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 492968,
"published_at": "2026-07-19T14:55:08.116+00:00"
}