CriticalFix available
smb: client: fix double-free in SMB2_ioctl() replay
Type: advisorySources: OSV
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix double-free in SMB2_ioctl() replay A response-bearing attempt can return a replayable error and free its response buffer. If SMB2_ioctl_init() fails before the next send, cleanup retains the previous buffer type and frees that response again. Reset response bookkeeping before each attempt to prevent the stale free.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 6.12.96, 6.18.39, 6.6.145, 7.1.4
- CVEs
- CVE-2026-64385
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 5 Nov 2026, 16:27 UTC · Revision 1
Source evidence
smb: client: fix double-free in SMB2_ioctl() replay
core-osv · Original sourcePublished 25 Jul 2026, 08:50 UTC
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix double-free in SMB2_ioctl() replay A response-bearing attempt can return a replayable error and free its response buffer. If SMB2_ioctl_init() fails before the next send, cleanup retains the previous buffer type and frees that response again. Reset response bookkeeping before each attempt to prevent the stale free.
osv:CVE-2026-64385
Kernel
Fixed versions: 6.6.145, 6.12.96, 6.18.39, 7.1.4
Complete source record
{
"id": "d2a0d0f391a98188633cea34896e77001b7c13a1fde1d39d96a360f2e6f246bf",
"url": "https://osv.dev/vulnerability/CVE-2026-64385",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "smb: client: fix double-free in SMB2_ioctl() replay",
"summary": "In the Linux kernel, the following vulnerability has been resolved: smb: client: fix double-free in SMB2_ioctl() replay A response-bearing attempt can return a replayable error and free its response buffer. If SMB2_ioctl_init() fails before the next send, cleanup retains the previous buffer type and frees that response again. Reset response bookkeeping before each attempt to prevent the stale free.",
"evidence": "osv:CVE-2026-64385",
"products": [
{
"name": {
"value": "Kernel",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "6.6.145",
"evidence": "/affected/1/ranges"
},
{
"value": "6.12.96",
"evidence": "/affected/1/ranges"
},
{
"value": "6.18.39",
"evidence": "/affected/1/ranges"
},
{
"value": "7.1.4",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
}
],
"severity": "critical",
"structured": {
"id": "CVE-2026-64385",
"aliases": [
"CVE-2026-64385"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"type": "GIT",
"events": [
{
"introduced": "433042a91f9373241307725b52de573933ffedbf"
},
{
"fixed": "0be4bc64882edaefaaee8d1e27d083643eb778e6"
}
]
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"type": "GIT",
"events": [
{
"introduced": "4f1fffa2376922f3d1d506e49c0fd445b023a28e"
},
{
"fixed": "96fcfc8ae7359346156e492ca610e830d2649ad6"
},
{
"fixed": "276c8efbc49f9303ac76d0d4deab7128581b0f3b"
},
{
"fixed": "fc65ffb4ef1bf540da16b17c225ae51091e07d72"
},
{
"fixed": "f9bbadb6c94583e3b4af1afc449bfceb1d1ddec9"
}
]
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"type": "GIT",
"events": [
{
"introduced": "6.6.32"
},
{
"fixed": "6.6.145"
}
]
}
],
"versions": [
"v6.6.144",
"v6.6.143",
"v6.6.142",
"v6.6.141",
"v6.6.140",
"v6.6.139",
"v6.6.138",
"v6.6.137",
"v6.6.136",
"v6.6.135",
"v6.6.134",
"v6.6.133",
"v6.6.132",
"v6.6.131",
"v6.6.130",
"v6.6.129",
"v6.6.128",
"v6.6.127",
"v6.6.126",
"v6.6.125",
"v6.6.124",
"v6.6.123",
"v6.6.122",
"v6.6.121",
"v6.6.120",
"v6.6.119",
"v6.6.118",
"v6.6.117",
"v6.6.116",
"v6.6.115",
"v6.6.114",
"v6.6.113",
"v6.6.112",
"v6.6.111",
"v6.6.110",
"v6.6.109",
"v6.6.108",
"v6.6.107",
"v6.6.106",
"v6.6.105",
"v6.6.104",
"v6.6.103",
"v6.6.102",
"v6.6.101",
"v6.6.100",
"v6.6.99",
"v6.6.98",
"v6.6.97",
"v6.6.96",
"v6.6.95",
"v6.6.94",
"v6.6.93",
"v6.6.92",
"v6.6.91",
"v6.6.90",
"v6.6.89",
"v6.6.88",
"v6.6.87",
"v6.6.86",
"v6.6.85",
"v6.6.84",
"v6.6.83",
"v6.6.82",
"v6.6.81",
"v6.6.80",
"v6.6.79",
"v6.6.78",
"v6.6.77",
"v6.6.76",
"v6.6.75",
"v6.6.74",
"v6.6.73",
"v6.6.72",
"v6.6.71",
"v6.6.70",
"v6.6.69",
"v6.6.68",
"v6.6.67",
"v6.6.66",
"v6.6.65",
"v6.6.64",
"v6.6.63",
"v6.6.62",
"v6.6.61",
"v6.6.60",
"v6.6.59",
"v6.6.58",
"v6.6.57",
"v6.6.56",
"v6.6.55",
"v6.6.54",
"v6.6.53",
"v6.6.52",
"v6.6.51",
"v6.6.50",
"v6.6.49",
"v6.6.48",
"v6.6.47",
"v6.6.46",
"v6.6.45",
"v6.6.44",
"v6.6.43",
"v6.6.42",
"v6.6.41",
"v6.6.40",
"v6.6.39",
"v6.6.38",
"v6.6.37",
"v6.6.36",
"v6.6.35",
"v6.6.34",
"v6.6.33",
"v6.6.32"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64385.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "6.6.145"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.7.0"
},
{
"fixed": "6.12.96"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.8.0"
},
{
"fixed": "6.18.39"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.13.0"
},
{
"fixed": "7.1.4"
}
]
}
],
"package": {
"name": "Kernel",
"ecosystem": "Linux"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64385.json"
}
}
],
"modified": "2026-10-28T02:30:44.282559281Z",
"provider": "osv",
"references": [
"https://git.kernel.org/stable/c/0be4bc64882edaefaaee8d1e27d083643eb778e6",
"https://git.kernel.org/stable/c/276c8efbc49f9303ac76d0d4deab7128581b0f3b",
"https://git.kernel.org/stable/c/96fcfc8ae7359346156e492ca610e830d2649ad6",
"https://git.kernel.org/stable/c/f9bbadb6c94583e3b4af1afc449bfceb1d1ddec9",
"https://git.kernel.org/stable/c/fc65ffb4ef1bf540da16b17c225ae51091e07d72",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64385.json",
"https://nvd.nist.gov/vuln/detail/CVE-2026-64385",
"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/2026/64xxx/CVE-2026-64385.json"
}
},
"related_cves": [
{
"value": "CVE-2026-64385",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 512395,
"published_at": "2026-07-25T08:50:33.997+00:00"
}