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CVE-2026-64388

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 informat
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:9407343fa35bfd663c3b1375cec9221ede656550451b245306340c22916a08bb
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/smb/client/inode.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"550cfb8a81181331d4d0f76ab75ee58a0bf41e3e","status":"affected","version":"b326614ea2159ea5c835d320f261d05d080cd201","versionType":"git"},{"lessThan":"760ef2c579c2609cf17fb1cd5392f64d42d43d33","status":"affected","version":"b326614ea2159ea5c835d320f261d05d080cd201","versionType":"git"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ee6c3208392abfd5892d926b3fb7d7d05fa3cd85c1037c1ebf5862aaf0d195f4 · sha256:5670d6ecdee5d054… · /containers/cna/affected/0

{"defaultStatus":"affected","product":"Linux","programFiles":["fs/smb/client/inode.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.18"},{"lessThan":"4.18","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc1","versionType":"original_commit_for_fix"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ee6c3208392abfd5892d926b3fb7d7d05fa3cd85c1037c1ebf5862aaf0d195f4 · sha256:5670d6ecdee5d054… · /containers/cna/affected/1

Affected products and versions

2 source assertions
{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/smb/client/inode.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"550cfb8a81181331d4d0f76ab75ee58a0bf41e3e","status":"affected","version":"b326614ea2159ea5c835d320f261d05d080cd201","versionType":"git"},{"lessThan":"760ef2c579c2609cf17fb1cd5392f64d42d43d33","status":"affected","version":"b326614ea2159ea5c835d320f261d05d080cd201","versionType":"git"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ee6c3208392abfd5892d926b3fb7d7d05fa3cd85c1037c1ebf5862aaf0d195f4 · sha256:5670d6ecdee5d054… · /containers/cna/affected/0
{"defaultStatus":"affected","product":"Linux","programFiles":["fs/smb/client/inode.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.18"},{"lessThan":"4.18","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc1","versionType":"original_commit_for_fix"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ee6c3208392abfd5892d926b3fb7d7d05fa3cd85c1037c1ebf5862aaf0d195f4 · sha256:5670d6ecdee5d054… · /containers/cna/affected/1

Provider-owned CVSS observations

1 source assertion
{"metric":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:ee6c3208392abfd5892d926b3fb7d7d05fa3cd85c1037c1ebf5862aaf0d195f4 · sha256:5670d6ecdee5d054… · /containers/cna/metrics/0/cvssV3_1

Source references

2 source assertions
{"url":"https://git.kernel.org/stable/c/550cfb8a81181331d4d0f76ab75ee58a0bf41e3e"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ee6c3208392abfd5892d926b3fb7d7d05fa3cd85c1037c1ebf5862aaf0d195f4 · sha256:5670d6ecdee5d054… · /containers/cna/references/0
{"url":"https://git.kernel.org/stable/c/760ef2c579c2609cf17fb1cd5392f64d42d43d33"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ee6c3208392abfd5892d926b3fb7d7d05fa3cd85c1037c1ebf5862aaf0d195f4 · sha256:5670d6ecdee5d054… · /containers/cna/references/1

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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