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Vulnerabilities CVE-2026-2340

CVE-2026-2340

Medium
Open
TLP:CLEAR

Samba: vfs_worm does not block directory modification

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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.

Details

CVSS Score
6.5
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Confidence
90%
Published
May 27, 2026
Last Modified
Aug 21, 2026
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