{"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":0.59401,"ingestedAt":"2026-07-03T13:02:27.475Z","slug":"CVE-2026-2340","body":"## Overview\n\nA 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.\n\n## Affected\n\n- `openshift_container_platform = 4.0`\n- `samba >= 4.1.0`\n- `enterprise_linux = 7.0`\n- `enterprise_linux = 8.0`\n- `enterprise_linux = 9.0`\n- `enterprise_linux = 10.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **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)\n- **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)\n- **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)\n- **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)\n- **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)\n- **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)\n- **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)\n- **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)\n- **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)\n- **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)\n- **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)\n- **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)\n- **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)\n- **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)\n- **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)\n- **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)","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}