CVE-2026-64379 (GCVE-0-2026-64379)
Vulnerability from cvelistv5 – Published: 2026-07-25 08:50 – Updated: 2026-07-25 08:50
VLAI
EPSS
VEX
Title
smb: client: mask server-provided mode to 07777 in modefromsid
Summary
In the Linux kernel, the following vulnerability has been resolved:
smb: client: mask server-provided mode to 07777 in modefromsid
When modefromsid is active, parse_dacl() applies the server-provided
sub_auth[2] value from the NFS mode SID to cf_mode without masking to
07777. Apply the correct masking, same as in the read path.
Severity
No CVSS data available.
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
e2f8fbfb8d09c06decde162090fac3ee220aa280 , < 5f6f2241034f189c69d4d0b5f8fe24a0c25b0c14
(git)
Affected: e2f8fbfb8d09c06decde162090fac3ee220aa280 , < ee2216dbdf0c677e89bb43e03247dba590ed00ef (git) Affected: e2f8fbfb8d09c06decde162090fac3ee220aa280 , < f511807feee7cb29b61bdfa86472c7e9e2e5df94 (git) Affected: e2f8fbfb8d09c06decde162090fac3ee220aa280 , < 08c600b7e1818539ba5efee4cdb06215c245ca78 (git) Affected: e2f8fbfb8d09c06decde162090fac3ee220aa280 , < b84e002e0df26bbc6cbd3ca01b8212601fe0ae7d (git) Affected: e2f8fbfb8d09c06decde162090fac3ee220aa280 , < c6c484a7d5bff6b929a86d7ed5130f29834c6a0d (git) Affected: e2f8fbfb8d09c06decde162090fac3ee220aa280 , < f80add1bfb3425100a325b14f19648e75669a954 (git) Affected: e2f8fbfb8d09c06decde162090fac3ee220aa280 , < e3d9c7160d483fc8f9e225aafad8ecbbc43f3151 (git) |
|
| Linux | Linux |
Affected:
5.4
Unaffected: 0 , < 5.4 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2-rc3 , ≤ * (original_commit_for_fix) |
{
"containers": {
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{
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"programFiles": [
"fs/smb/client/cifsacl.c"
],
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},
{
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}
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],
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"vendor": "Linux",
"versions": [
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"version": "5.4"
},
{
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"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.261",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.212",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.178",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.145",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.96",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.39",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.4",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "7.2-rc3",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
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}
],
"negate": false,
"operator": "OR"
}
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}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: mask server-provided mode to 07777 in modefromsid\n\nWhen modefromsid is active, parse_dacl() applies the server-provided\nsub_auth[2] value from the NFS mode SID to cf_mode without masking to\n07777. Apply the correct masking, same as in the read path."
}
],
"providerMetadata": {
"dateUpdated": "2026-07-25T08:50:29.717Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/5f6f2241034f189c69d4d0b5f8fe24a0c25b0c14"
},
{
"url": "https://git.kernel.org/stable/c/ee2216dbdf0c677e89bb43e03247dba590ed00ef"
},
{
"url": "https://git.kernel.org/stable/c/f511807feee7cb29b61bdfa86472c7e9e2e5df94"
},
{
"url": "https://git.kernel.org/stable/c/08c600b7e1818539ba5efee4cdb06215c245ca78"
},
{
"url": "https://git.kernel.org/stable/c/b84e002e0df26bbc6cbd3ca01b8212601fe0ae7d"
},
{
"url": "https://git.kernel.org/stable/c/c6c484a7d5bff6b929a86d7ed5130f29834c6a0d"
},
{
"url": "https://git.kernel.org/stable/c/f80add1bfb3425100a325b14f19648e75669a954"
},
{
"url": "https://git.kernel.org/stable/c/e3d9c7160d483fc8f9e225aafad8ecbbc43f3151"
}
],
"title": "smb: client: mask server-provided mode to 07777 in modefromsid",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-64379",
"datePublished": "2026-07-25T08:50:29.717Z",
"dateReserved": "2026-07-19T15:36:31.784Z",
"dateUpdated": "2026-07-25T08:50:29.717Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-64379",
"date": "2026-07-26",
"epss": "0.00177",
"percentile": "0.07469"
},
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"suse_vex": {
"aggregate_severity": "not set",
"current_release_date": "2026-07-25T16:00:34Z",
"cve": "CVE-2026-64379",
"id": "CVE-2026-64379",
"initial_release_date": "2026-07-25T16:00:34Z",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-64379",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64379.json",
"version": "2"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
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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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
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