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With package: crun

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Published
Permalink CVE-2026-30892
0.0 NONE
  • CVSS version (CVSS): 3.1
  • Attack Vector (AV): Local (L)
  • Attack Complexity (AC): Low (L)
  • Privileges Required (PR): None (N)
  • User Interaction (UI): None (N)
  • Scope (S): Unchanged (U)
  • Confidentiality (C): None (N)
  • Integrity (I): None (N)
  • Availability (A): None (N)
  • Modified Attack Vector (MAV): Local (L)
  • Modified Attack Complexity (MAC): Low (L)
  • Modified Privileges Required (MPR): None (N)
  • Modified User Interaction (MUI): None (N)
  • Modified Confidentiality (MC): None (N)
  • Modified Scope (MS): Unchanged (U)
  • Modified Integrity (MI): None (N)
  • Modified Availability (MA): None (N)
updated 2 months, 4 weeks ago by @LeSuisse Activity log
  • Created suggestion
  • @LeSuisse ignored
    8 packages
    • nym
    • crunch
    • y-cruncher
    • speedcrunch
    • ocaml-crunch
    • ocamlPackages.crunch
    • ocamlPackages_latest.crunch
    • vscode-extensions.42crunch.vscode-openapi
  • @LeSuisse accepted
  • @LeSuisse published on GitHub
Crun incorrectly parses `crun exec` option `-u`, leading to privilege escalation

crun is an open source OCI Container Runtime fully written in C. In versions 1.19 through 1.26, the `crun exec` option `-u` (`--user`) is incorrectly parsed. The value `1` is interpreted as UID 0 and GID 0 when it should have been UID 1 and GID 0. The process thus runs with higher privileges than expected. Version 1.27 patches the issue.

Affected products

crun
  • ==>= 1.19, < 1.27

Matching in nixpkgs

pkgs.crun

Fast and lightweight fully featured OCI runtime and C library for running containers

  • nixos-unstable 1.26
    • nixpkgs-unstable 1.26
    • nixos-unstable-small 1.26
Ignored packages (8)

pkgs.crunch

Wordlist generator

  • nixos-unstable 3.6
    • nixpkgs-unstable 3.6
    • nixos-unstable-small 3.6

pkgs.ocaml-crunch

Convert a filesystem into a static OCaml module

Package maintainers

Upstream advisory: https://github.com/containers/crun/security/advisories/GHSA-4vg2-xjqj-7chj
Upstream patch: https://github.com/containers/crun/commit/1bd7f42446999b0e76bc3d575392e05c943b0b01