{"schemaVersion":3,"id":"CVE-2026-66484","aliases":["RHSA-2026:54508","UBUNTU-CVE-2026-66484","DEBIAN-CVE-2026-66484"],"status":"published","duplicateOf":null,"title":null,"description":"GNU cpio contains a Path Traversal vulnerability in its tar archive extraction functionality. When extracting a tar archive in copy-in mode with the --no-absolute-filenames option, the extracted file name is normalized but the tar hard-link target is passed to the link_to_name function without equivalent sanitization before calling link function. A tar archive provided by an attacker, containing a hard-link entry whose linkname is set to an absolute path outside the extraction directory, can cause cpio to create a hard link to an existing file outside the intended extraction directory, breaking the expected guarantee of --no-absolute-filenames and allowing archive-controlled linkage to external files.\n\nThis issue has been fixed in commit 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