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CVE record · CVE-2026-64388

smb/client: fix chown/chgrp with SMB3 POSIX Extensions

CVSS 7.8 HighEPSS 0.0013 · 2nd percentile

Published by the CVE Program (CNA: Linux) at 25 Jul 2026, 08:50 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
VendorProductVersions
Linux Linux
  • affected b326614ea2159ea5c835d320f261d05d080cd201 to before c0fe1118a1471d459f76c3e70ff2abbf784ce6bf git
  • affected b326614ea2159ea5c835d320f261d05d080cd201 to before 6825a45f6b8ef76b0ee32649ec3d6e39ca143a18 git
  • affected b326614ea2159ea5c835d320f261d05d080cd201 to before 27ead8c5418af6bfab711079fecb9414d78d4cae git
  • affected b326614ea2159ea5c835d320f261d05d080cd201 to before 3eaec47518e126e6dcd1a48521d740278073f0ec git
  • affected b326614ea2159ea5c835d320f261d05d080cd201 to before 550cfb8a81181331d4d0f76ab75ee58a0bf41e3e git
  • affected b326614ea2159ea5c835d320f261d05d080cd201 to before 760ef2c579c2609cf17fb1cd5392f64d42d43d33 git
Other versions: unaffected
Linux Linux
  • affected 4.18
  • unaffected before 4.18 semver
  • unaffected 6.1.191 to 6.1.*, inclusive semver
  • unaffected 6.6.160 to 6.6.*, inclusive semver
  • unaffected 6.12.114 to 6.12.*, inclusive semver
  • unaffected 6.18.57 to 6.18.*, inclusive semver
  • unaffected 7.1.4 to 7.1.*, inclusive semver
  • unaffected 7.2 to *, inclusive original_commit_for_fix
Other versions: affected
Identifiers
CVE-2026-64388
CNA
Linux
Weakness (CWE)
CWE-682
Tags
Published
25 Jul 2026
Updated
30 Oct 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

ScoreRatingCVSSVectorSource
7.8 High 3.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CNA (Linux)
  • CISA KEV Not listed.
  • EPSS 0.0013, the 2nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 25 Jul 2026. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.