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Suggestion detail

Untriaged
Permalink CVE-2026-35359
4.7 MEDIUM
  • CVSS version: 3.1
  • Attack vector (AV): LOCAL
  • Attack complexity (AC): HIGH
  • Privileges required (PR): LOW
  • User interaction (UI): NONE
  • Scope (S): UNCHANGED
  • Confidentiality impact (C): HIGH
  • Integrity impact (I): NONE
  • Availability impact (A): NONE
created 6 days, 11 hours ago Activity log
  • Created suggestion
uutils coreutils cp Information Disclosure via Time-of-Check to Time-of-Use Symlink Swap

A Time-of-Check to Time-of-Use (TOCTOU) vulnerability in the cp utility of uutils coreutils allows an attacker to bypass no-dereference intent. The utility checks if a source path is a symbolic link using path-based metadata but subsequently opens it without the O_NOFOLLOW flag. An attacker with concurrent write access can swap a regular file for a symbolic link during this window, causing a privileged cp process to copy the contents of arbitrary sensitive files into a destination controlled by the attacker.

References

Affected products

coreutils

Matching in nixpkgs

pkgs.coreutils

GNU Core Utilities

  • nixos-unstable 9.10
    • nixpkgs-unstable 9.10
    • nixos-unstable-small 9.10
  • nixos-25.11 9.8
    • nixos-25.11-small 9.8
    • nixpkgs-25.11-darwin 9.8