smb/client: fix chown/chgrp with SMB3 POSIX Extensions
Impact
In the Linux kernel, the following vulnerability has been resolved:
Source excerpt · LinuxAffected packages
Affected products
Vendor version evidence. Product records are separate from automatic dependency matching.
Linux · Linux
Linux
6 ranges
Linux · Linux
Linux
Compare with this publisher’s ranges. This does not inspect your installation.
affected
b326614ea2159ea5c835d320f261d05d080cd201 → before c0fe1118a1471d459f76c3e70ff2abbf784ce6bf
git versions
b326614ea2159ea5c835d320f261d05d080cd201 → before 6825a45f6b8ef76b0ee32649ec3d6e39ca143a18
git versions
b326614ea2159ea5c835d320f261d05d080cd201 → before 27ead8c5418af6bfab711079fecb9414d78d4cae
git versions
b326614ea2159ea5c835d320f261d05d080cd201 → before 3eaec47518e126e6dcd1a48521d740278073f0ec
git versions
b326614ea2159ea5c835d320f261d05d080cd201 → before 550cfb8a81181331d4d0f76ab75ee58a0bf41e3e
git versions
b326614ea2159ea5c835d320f261d05d080cd201 → before 760ef2c579c2609cf17fb1cd5392f64d42d43d33
git versions
Other versions: unaffected
Linux · Linux
Linux
8 ranges
Linux · Linux
Linux
Compare with this publisher’s ranges. This does not inspect your installation.
affected
4.18
unaffected
0 → before 4.18
semver versions
6.1.191 → through 6.1.*
semver versions
6.6.160 → through 6.6.*
semver versions
6.12.114 → through 6.12.*
semver versions
6.18.57 → through 6.18.*
semver versions
7.1.4 → through 7.1.*
semver versions
7.2 → through *
original_commit_for_fix versions
Other versions: affected
Original source description
In the Linux kernel, the following vulnerability has been resolved:
smb/client: fix chown/chgrp with SMB3 POSIX Extensions
Ownership (chown) and group (chgrp) modifications were being ignored when mounting with SMB3 POSIX Extensions unless CIFS_MOUNT_CIFS_ACL or CIFS_MOUNT_MODE_FROM_SID were also explicitly set.
Fix this by checking for posix_extensions in cifs_setattr_nounix() when updating UID and GID, ensuring that id_mode_to_cifs_acl() is called to map and set the ownership/group information on the server.
Inside the record
Evidence available
Describes the evidence in this view, not whether the product is safe.
Original records
CVE-2026-64388View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.
cve.new JSON →Underlying weaknesses
The source’s classification of what caused the vulnerability.
Environment requirements
These conditions apply together as specified by the publisher. A matching product name alone does not establish exposure.
Linux · platform conditions
Any condition may hold
Vulnerable product
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*From (inclusive): 4.18
Before: 6.1.191
Vulnerable product
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*From (inclusive): 4.18
Before: 6.6.160
Vulnerable product
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*From (inclusive): 4.18
Before: 6.12.114
Vulnerable product
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*From (inclusive): 4.18
Before: 6.18.57
Vulnerable product
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*From (inclusive): 4.18
Before: 7.1.4
Vulnerable product
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*From (inclusive): 4.18
Before: 7.2
Original applicability statements
[
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.18",
"versionEndExcluding": "6.1.191"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.18",
"versionEndExcluding": "6.6.160"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.18",
"versionEndExcluding": "6.12.114"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.18",
"versionEndExcluding": "6.18.57"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.18",
"versionEndExcluding": "7.1.4"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.18",
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}
]
}
]
}
]Contributing organizations · 2
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What changed
Follow changesLarge field values are marked as truncated previews. Original source snapshots remain retained.