--- id: CVE-2026-2340 title: A flaw was found in Samba’s vfs_worm module summary: >- 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 o… severity: medium cvss: 6.5 cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N' cwe: - CWE-280 vendor: redhat product: openshift_container_platform affected: - openshift_container_platform = 4.0 - samba >= 4.1.0 - enterprise_linux = 7.0 - enterprise_linux = 8.0 - enterprise_linux = 9.0 - enterprise_linux = 10.0 patched: - openshift_container_platform 4.12 - openshift_container_platform 4.14 - openshift_container_platform 4.15 - openshift_container_platform 4.16 - openshift_container_platform 4.17 - openshift_container_platform 4.18 - openshift_container_platform 4.19 - enterprise_linux_appstream_eus_v_10_0 - enterprise_linux_appstream_v_10 - enterprise_linux_appstream_v_8 - enterprise_linux_appstream_aus_v_8_6 - enterprise_linux_appstream_eus_extension_v_8_6 - enterprise_linux_appstream_e4s_v_8_8 - enterprise_linux_appstream_tus_v_8_8 - enterprise_linux_appstream_e4s_v_9_2 - enterprise_linux_appstream_e4s_v_9_4 - enterprise_linux_appstream_eus_v_9_6 - enterprise_linux_appstream_v_9 - enterprise_linux_baseos_eus_v_10_0 - enterprise_linux_baseos_v_10 - enterprise_linux_baseos_v_8 - enterprise_linux_baseos_aus_v_8_6 - enterprise_linux_baseos_eus_extension_v_8_6 - enterprise_linux_baseos_e4s_v_8_8 - enterprise_linux_baseos_tus_v_8_8 - enterprise_linux_baseos_e4s_v_9_2 - enterprise_linux_baseos_e4s_v_9_4 - enterprise_linux_baseos_eus_v_9_6 - enterprise_linux_baseos_v_9 - enterprise_linux_codeready_linux_builder_eus_v_10_0 - enterprise_linux_codeready_linux_builder_v_10 - enterprise_linux_crb_v_8 - codeready_linux_builder_eus_v_9_6 - enterprise_linux_codeready_linux_builder_v_9 - enterprise_linux_resilient_storage_e4s_v_9_2 - enterprise_linux_resilient_storage_e4s_v_9_4 - enterprise_linux_resilient_storage_eus_v_9_6 - enterprise_linux_resilient_storage_v_9 published: '2026-05-27' updated: '2026-09-17' sourceUpdated: '2026-09-17T19:16:42.980' source: NVD sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-2340' references: - url: 'https://access.redhat.com/errata/RHSA-2026:22644' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:22963' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:25049' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:25979' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:28053' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:28054' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:28055' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:28056' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:28057' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:29863' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:56786' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:56853' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:56911' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:57483' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:59831' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:60019' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:62409' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:62549' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:65839' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:65851' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:65907' label: secalert@redhat.com - url: 'https://access.redhat.com/security/cve/CVE-2026-2340' label: secalert@redhat.com - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2447318' label: secalert@redhat.com - url: 'https://bugzilla.samba.org/show_bug.cgi?id=15997' label: secalert@redhat.com - url: >- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-2340.json - url: 'https://www.cve.org/CVERecord?id=CVE-2026-2340' - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-2340' tags: - nvd - cve.org - csaf - vex - red-hat ssvc: exploitation: none automatable: 'no' technicalImpact: partial timestamp: '2026-05-29T15:35:51.156381Z' epss: 0.00939 epssPercentile: 0.59431 ingestedAt: '2026-07-03T13:02:27.475Z' --- ## Overview 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. ## Affected - `openshift_container_platform = 4.0` - `samba >= 4.1.0` - `enterprise_linux = 7.0` - `enterprise_linux = 8.0` - `enterprise_linux = 9.0` - `enterprise_linux = 10.0` ## Remediation Refer to the linked advisories for vendor-supplied fixes and affected version ranges. ## Vendor advisories - **RHSA-2026:59831** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.12 · released 2026-09-03 · [advisory](https://access.redhat.com/errata/RHSA-2026:59831) - **RHSA-2026:56786** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.14 · released 2026-08-31 · [advisory](https://access.redhat.com/errata/RHSA-2026:56786) - **RHSA-2026:56911** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.15 · released 2026-08-31 · [advisory](https://access.redhat.com/errata/RHSA-2026:56911) - **RHSA-2026:56853** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.16 · released 2026-08-31 · [advisory](https://access.redhat.com/errata/RHSA-2026:56853) - **RHSA-2026:62549** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.16 · released 2026-09-10 · [advisory](https://access.redhat.com/errata/RHSA-2026:62549) - **RHSA-2026:60019** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.17 · released 2026-09-03 · [advisory](https://access.redhat.com/errata/RHSA-2026:60019) - **RHSA-2026:57483** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.18 · released 2026-08-26 · [advisory](https://access.redhat.com/errata/RHSA-2026:57483) - **RHSA-2026:29863** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.19 · released 2026-07-02 · [advisory](https://access.redhat.com/errata/RHSA-2026:29863) - **RHSA-2026:28055** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux BaseOS EUS (v. 10.0), Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) · released 2026-06-23 · [advisory](https://access.redhat.com/errata/RHSA-2026:28055) - **RHSA-2026:22963** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux BaseOS (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) · released 2026-06-03 · [advisory](https://access.redhat.com/errata/RHSA-2026:22963) - **RHSA-2026:22644** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux BaseOS (v. 8), Red Hat Enterprise Linux CRB (v. 8) · released 2026-06-03 · [advisory](https://access.redhat.com/errata/RHSA-2026:22644) - **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat OpenShift Container Platform 4 · updated 2026-09-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-2340.json) - **RHSA-2026:62409** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.14 · released 2026-09-14 · [advisory](https://access.redhat.com/errata/RHSA-2026:62409) - **RHSA-2026:65907** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.12 · released 2026-09-17 · [advisory](https://access.redhat.com/errata/RHSA-2026:65907) - **RHSA-2026:65851** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.18 · released 2026-09-17 · [advisory](https://access.redhat.com/errata/RHSA-2026:65851) - **RHSA-2026:65839** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.13 · released 2026-09-17 · [advisory](https://access.redhat.com/errata/RHSA-2026:65839)