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

CVSS 6.5 · Medium EPSS 0.03% · P9
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I. Basic Information for CVE-2026-2340

Vulnerability Information
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Vulnerability Title
Samba: vfs_worm does not block directory modification
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
不充分权限或特权的处理不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Samba 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Samba是Samba开源的一个适用于 Linux 和 Unix 的标准 Windows 互操作性程序套件。 Samba存在安全漏洞，该漏洞源于vfs_worm模块在重命名操作期间验证不足，可能导致经过身份验证的用户通过重命名新创建文件覆盖受WORM保护的文件。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
Red HatRed Hat Enterprise Linux 10-cpe:/o:redhat:enterprise_linux:10
Red HatRed Hat Enterprise Linux 6-cpe:/o:redhat:enterprise_linux:6
Red HatRed Hat Enterprise Linux 6-cpe:/o:redhat:enterprise_linux:6
Red HatRed Hat Enterprise Linux 7-cpe:/o:redhat:enterprise_linux:7
Red HatRed Hat Enterprise Linux 8-cpe:/o:redhat:enterprise_linux:8
Red HatRed Hat Enterprise Linux 9-cpe:/o:redhat:enterprise_linux:9
Red HatRed Hat OpenShift Container Platform 4-cpe:/a:redhat:openshift:4

II. Public POCs for CVE-2026-2340

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III. Intelligence Information for CVE-2026-2340

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Patches & Fixes for CVE-2026-2340 (1)

Vendor Advisories for CVE-2026-2340 (1)

Other References for CVE-2026-2340 (1)

Same Patch Batch · Red Hat · 2026-05-27 · 5 CVEs total

CVE-2026-30128.0 HIGHSamba: group policy certificate enrollment uses http:// without validation
CVE-2026-19337.1 HIGHSamba: missing access check on reparse point operations
CVE-2026-97046.8 MEDIUMKeycloak: keycloak: privilege escalation due to oversized subject_token jwt
CVE-2026-96894.2 MEDIUMKeycloak: org.keycloak.protocol.oidc: http parameter pollution in oidc redirect uri allows

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 10
Same vendor: Red Hat
Same weakness: CWE-280

V. Comments for CVE-2026-2340

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