https://cve.radiocsirt.org/rss/recent/all/10 Most recent entries from all 2026-10-06T12:37:26.439392+00:00 Vulnerability-Lookup csirt@opendfir.org python-feedgen Contains only the most 10 recent entries. https://cve.radiocsirt.org/vuln/ubuntu-cve-2023-4091 UBUNTU-CVE-2023-4091 2026-10-06T12:37:26.551069+00:00

Affected: Ubuntu:Pro:14.04:LTS: samba, Ubuntu:Pro:16.04:LTS: samba, Ubuntu:Pro:18.04:LTS: samba, Ubuntu:20.04:LTS: samba, Ubuntu:22.04:LTS: samba, Ubuntu:24.04:LTS: samba

A vulnerability was discovered in Samba, where the flaw allows SMB clients to truncate files, even with read-only permissions when the Samba VFS module "acl_xattr" is configured with "acl_xattr:ignore system acls = yes". The SMB protocol allows opening files when the client requests read-only access but then implicitly truncates the opened file to 0 bytes if the client specifies a separate OVERWRITE create disposition request. The issue arises in configurations that bypass kernel file system permissions checks, relying solely on Samba's permissions.