CVE-2026-2340

Medium

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.

SeverityMedium

CVSS6.5

Exploit probability—

Product

Samba

PublishedMay 27, 2026

First seenMay 27, 2026

Weakness typeCWE-280CWE-280

How to fix

Update

samba samba4.22.10, 4.23.8, 4.24.3 or later
redhat openshift_container_platform4.12.97, 4.13.71, 4.14.72, 4.15.68, 4.16.69, 4.17.57, 4.18.54, 4.19.36 or later

Vendor advisories

Affected products

Product	Affected versions	Fixed in
samba samba	4.1.0 ≤ v, 4.20.0 ≤ v < 4.22.10, 4.23.0 ≤ v < 4.23.8, 4.24.0 ≤ v < 4.24.3	4.22.10, 4.23.8, 4.24.3
redhat openshift_container_platform	4.0, 4.12 ≤ v < 4.12.97, 4.13 ≤ v < 4.13.71, 4.14 ≤ v < 4.14.72, 4.15 ≤ v < 4.15.68, 4.16 ≤ v < 4.16.69, 4.17 ≤ v < 4.17.57, 4.18 ≤ v < 4.18.54, 4.19 ≤ v < 4.19.36	4.12.97, 4.13.71, 4.14.72, 4.15.68, 4.16.69, 4.17.57, 4.18.54, 4.19.36
redhat enterprise_linux	7.0, 8.0, 9.0, 10.0	—

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