CVE-2026-2340

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.

Scoring

Severity

MEDIUM

CVSS base score

6.5

CVSS vector

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

EPSS probability

0.94%

CWE

CWE-280

Published

2026-05-27

Last modified

2026-09-03

Affected products

• Red Hat Red Hat Enterprise Linux 10
• Red Hat Red Hat Enterprise Linux 9
• Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support
• Red Hat Red Hat Enterprise Linux 8
• Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
• Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On
• Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support
• Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service

Weakness type

• CWE-280

Related vulnerabilities

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• CVE-2026-58416 — Fork-PR Actions task can read a third private repository via the collaborative-owner branch (missing fork-PR guard)
• CVE-2026-73239 — Apache Allura: Missing permission checks IDOR
• CVE-2026-18860 — Velociraptor incorrect Org deletion permissions check
• CVE-2026-11804 — Program Module Vulnerability
• CVE-2026-62393 — Apache Kylin: Improper authorization in job information retrieval

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