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CVE-2026-66484 on CTRL-OS 26.05

Aliases: CVE-2026-66484

Packages: cpio

Status: Plausible

Advisory Information

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.

This issue has been fixed in commit e2b9cbdd3354d2b1569b7390d1bc15c1930559ad

Updates

2026-08-21 15:20 CEST

Metadata changes:

  • Status for package cpio: “Plausible”

2026-08-21 15:18 CEST

Metadata changes:

  • Status for package cpio: “New”