UnratedFix available
USB: serial: cypress_m8: fix memory corruption with small endpoint
Type: advisorySources: OSV
In the Linux kernel, the following vulnerability has been resolved: USB: serial: cypress_m8: fix memory corruption with small endpoint Make sure that the interrupt-out endpoint max packet size is at least eight bytes to avoid user-controlled slab corruption or NULL-pointer dereference 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-2026-63956
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 19:47 UTC · Revision 1
Source evidence
USB: serial: cypress_m8: 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: cypress_m8: fix memory corruption with small endpoint Make sure that the interrupt-out endpoint max packet size is at least eight bytes to avoid user-controlled slab corruption or NULL-pointer dereference should a malicious device report a smaller size.
osv:CVE-2026-63956
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": "4c3fd691d0878c27bc3c83ac13180de69abf6360cf0fda61024cd42e76abedb9",
"url": "https://osv.dev/vulnerability/CVE-2026-63956",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "USB: serial: cypress_m8: fix memory corruption with small endpoint",
"summary": "In the Linux kernel, the following vulnerability has been resolved: USB: serial: cypress_m8: fix memory corruption with small endpoint Make sure that the interrupt-out endpoint max packet size is at least eight bytes to avoid user-controlled slab corruption or NULL-pointer dereference should a malicious device report a smaller size.",
"evidence": "osv:CVE-2026-63956",
"products": [
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"name": {
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"prerequisites": [],
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"value": "5.10.259",
"evidence": "/affected/1/ranges"
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{
"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"
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{
"value": "6.18.35",
"evidence": "/affected/1/ranges"
},
{
"value": "7.0.12",
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"affected_versions": []
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"severity": "unknown",
"structured": {
"id": "CVE-2026-63956",
"aliases": [
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"affected": [
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},
{
"ranges": [
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"events": [
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{
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{
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{
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{
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{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.19.0"
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{
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],
"package": {
"name": "Kernel",
"ecosystem": "Linux"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63956.json"
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],
"modified": "2026-11-01T02:30:31.227728759Z",
"provider": "osv",
"references": [
"https://git.kernel.org/stable/c/1ef25704bd3b625fd151c09feee459479f71ee64",
"https://git.kernel.org/stable/c/284105c40fc31fff90cdab8a0377aaeb92f87f0e",
"https://git.kernel.org/stable/c/4bcaa59f403dbde6328604a500d65ee8d40975d9",
"https://git.kernel.org/stable/c/4fcb22218f0a7229b7ce3b3952fb644def293fa5",
"https://git.kernel.org/stable/c/52e18ae0c47c5c89e18fcd8022f287f7cc8802ec",
"https://git.kernel.org/stable/c/6c13f3bb652bc8665e709ba07122612586aea648",
"https://git.kernel.org/stable/c/ad3d1628a46134276546d7a12fedf04be9979158",
"https://git.kernel.org/stable/c/e1a9d791fd66ab2431b9e6f6f835823809869047",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63956.json",
"https://nvd.nist.gov/vuln/detail/CVE-2026-63956",
"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-2026-63956.json"
}
},
"related_cves": [
{
"value": "CVE-2026-63956",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 506336,
"published_at": "2026-07-19T14:55:47.597+00:00"
}