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6.5 Medium

CVE-2026-2340 Samba: vfs_worm does not block directory modification

Description

A flaw was found in Samba’s vfs_worm module. The module is intended to provide write-once, read-many (WORM) protections by preventing modification of files after a configurable grace period. Due to insufficient validation during rename operations, an authenticated user with write access to a share could overwrite a protected file by renaming a newly created file over the existing WORM-protected file.

CVSS 3.1 detail

Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Exploitable remotely over the network, with an ordinary account and without any user action; an attacker can seriously compromise confidentiality, integrity or availability.

Attack vector
Network
Attack complexity
Low
Privileges required
Low
Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

Affected products and versions

Product Affected versions Fixed in
Red Hat Enterprise Linux 10 Versions not published
Red Hat Enterprise Linux 6 Versions not published
Red Hat Enterprise Linux 7 Versions not published
Red Hat Enterprise Linux 8 Versions not published
Red Hat Enterprise Linux 9 Versions not published
Red Hat OpenShift Container Platform 4 Versions not published
Red Hat Enterprise Linux 9.6 Extended Update Support Versions not published
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Versions not published
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On Versions not published
Show the 13 other branches
Product Affected versions Fixed in
Red Hat Enterprise Linux 10.0 Extended Update Support Versions not published
Red Hat Enterprise Linux 8.8 Telecommunications Update Service Versions not published
Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Versions not published
Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Versions not published
Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions Versions not published
Red Hat OpenShift Container Platform 4.19 4.19 earliest → < 4.19.9.6.202606241344-0 4.19.9.6.202606241344-0
Red Hat OpenShift Container Platform 4.18 418.94 earliest → < 418.94.202609031320-0 418.94.202609031320-0
Red Hat OpenShift Container Platform 4.14 414.92 earliest → < 414.92.202609011250-0 414.92.202609011250-0
Red Hat OpenShift Container Platform 4.15 415.92 earliest → < 415.92.202609140326-0 415.92.202609140326-0
Red Hat OpenShift Container Platform 4.16 416.94 earliest → < 416.94.202609011112-0 416.94.202609011112-0
Red Hat OpenShift Container Platform 4.12 412.86 earliest → < 412.86.202609082051-0 412.86.202609082051-0
Red Hat OpenShift Container Platform 4.17 417.94 earliest → < 417.94.202609191027-0 417.94.202609191027-0
Red Hat OpenShift Container Platform 4.13 413.92 earliest → < 413.92.202609302032-0 413.92.202609302032-0

References

Timeline

  1. Published
  2. Last modified

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