CVE-2025-68817 (GCVE-0-2025-68817)
Vulnerability from cvelistv5 – Published: 2026-01-13 15:29 – Updated: 2026-01-14 08:51
VLAI?
Title
ksmbd: fix use-after-free in ksmbd_tree_connect_put under concurrency
Summary
In the Linux kernel, the following vulnerability has been resolved:
ksmbd: fix use-after-free in ksmbd_tree_connect_put under concurrency
Under high concurrency, A tree-connection object (tcon) is freed on
a disconnect path while another path still holds a reference and later
executes *_put()/write on it.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Affected:
7b58ee8d0b91359554cf219cd4f33872ea2afd66 , < d092de8a26c952379ded8e6b0bda31d89befac1a
(git)
Affected: 33b235a6e6ebe0f05f3586a71e8d281d00f71e2e , < d64977495e44855f2b28d8ce56107c963a7a50e4 (git) Affected: 33b235a6e6ebe0f05f3586a71e8d281d00f71e2e , < 21a3d01fc6db5129f81edb0ab7cb94fd758bcbea (git) Affected: 33b235a6e6ebe0f05f3586a71e8d281d00f71e2e , < 063cbbc6f595ea36ad146e1b7d2af820894beb21 (git) Affected: 33b235a6e6ebe0f05f3586a71e8d281d00f71e2e , < b39a1833cc4a2755b02603eec3a71a85e9dff926 (git) Affected: dd45db4d9bbc8f122a9b4db5ce94ae29fcf03d3c (git) |
||
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"fs/smb/server/mgmt/tree_connect.c",
"fs/smb/server/mgmt/tree_connect.h",
"fs/smb/server/smb2pdu.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
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"versionType": "git"
},
{
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"status": "affected",
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"versionType": "git"
},
{
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"versionType": "git"
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{
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}
]
},
{
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"programFiles": [
"fs/smb/server/mgmt/tree_connect.c",
"fs/smb/server/mgmt/tree_connect.h",
"fs/smb/server/smb2pdu.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.6"
},
{
"lessThan": "6.6",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.160",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.120",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.64",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.3",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.19-rc1",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.1.71",
"vulnerable": true
},
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},
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{
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},
{
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"versionStartIncluding": "6.6",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.15.145",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: fix use-after-free in ksmbd_tree_connect_put under concurrency\n\nUnder high concurrency, A tree-connection object (tcon) is freed on\na disconnect path while another path still holds a reference and later\nexecutes *_put()/write on it."
}
],
"providerMetadata": {
"dateUpdated": "2026-01-14T08:51:40.603Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/d092de8a26c952379ded8e6b0bda31d89befac1a"
},
{
"url": "https://git.kernel.org/stable/c/d64977495e44855f2b28d8ce56107c963a7a50e4"
},
{
"url": "https://git.kernel.org/stable/c/21a3d01fc6db5129f81edb0ab7cb94fd758bcbea"
},
{
"url": "https://git.kernel.org/stable/c/063cbbc6f595ea36ad146e1b7d2af820894beb21"
},
{
"url": "https://git.kernel.org/stable/c/b39a1833cc4a2755b02603eec3a71a85e9dff926"
}
],
"title": "ksmbd: fix use-after-free in ksmbd_tree_connect_put under concurrency",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2025-68817",
"datePublished": "2026-01-13T15:29:21.210Z",
"dateReserved": "2025-12-24T10:30:51.048Z",
"dateUpdated": "2026-01-14T08:51:40.603Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2025-68817\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-01-13T16:16:03.983\",\"lastModified\":\"2026-01-14T16:26:00.933\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nksmbd: fix use-after-free in ksmbd_tree_connect_put under concurrency\\n\\nUnder high concurrency, A tree-connection object (tcon) is freed on\\na disconnect path while another path still holds a reference and later\\nexecutes *_put()/write on it.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/063cbbc6f595ea36ad146e1b7d2af820894beb21\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/21a3d01fc6db5129f81edb0ab7cb94fd758bcbea\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b39a1833cc4a2755b02603eec3a71a85e9dff926\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d092de8a26c952379ded8e6b0bda31d89befac1a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d64977495e44855f2b28d8ce56107c963a7a50e4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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