Vulnerability · Published Mar 25, 2026 · Assigned by GitHub_M
CVE-2026-30892Crun incorrectly parses `crun exec` option `-u`, leading to privilege escalation
None 0.0
In plain English
A privilege mismanagement in crun from containers. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 6% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:10 | crun | 1.27-2.el10_2 | ALSA-2026:19020 |
| AlmaLinux:10 | crun | 1.27-1.el10_1 | ALSA-2026:6622 |
| AlmaLinux:9 | crun | 1.27-1.el9_8 | ALSA-2026:19178 |
| AlmaLinux:9 | crun | 1.27-1.el9_7 | ALSA-2026:6621 |
| AlmaLinux:10 | crun-krun | 1.27-2.el10_2 | ALSA-2026:19020 |
| Alpine:v3.23 | crun | 1.27-r0 | ALPINE-CVE-2026-30892 |
| Alpine:v3.24 | crun | 1.27-r0 | ALPINE-CVE-2026-30892 |
| Debian:13 | crun | no fix listed | DEBIAN-CVE-2026-30892 |
| Debian:14 | crun | 1.27-1 | DEBIAN-CVE-2026-30892 |
| Rocky Linux:10 | crun | 0:1.27-1.el10_1 | RLSA-2026:6622 |
| Rocky Linux:10 | crun | 0:1.27-2.el10_2 | RLSA-2026:19020 |
| Rocky Linux:9 | crun | 0:1.27-1.el9_7 | RLSA-2026:19178 |
| Rocky Linux:9 | crun | 0:1.27-1.el9_7 | RLSA-2026:6621 |
| Ubuntu:22.04:LTS | crun | no fix listed | UBUNTU-CVE-2026-30892 |
| Ubuntu:24.04:LTS | crun | no fix listed | UBUNTU-CVE-2026-30892 |
| Ubuntu:25.10 | crun | no fix listed | UBUNTU-CVE-2026-30892 |
| Ubuntu:26.04:LTS | crun | no fix listed | UBUNTU-CVE-2026-30892 |
| Ubuntu:26.10 | crun | no fix listed | UBUNTU-CVE-2026-30892 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| containers | crun | >= 1.19, < 1.27 |
Weakness: CWE-269 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N
References
- https://github.com/containers/crun/security/advisories/GHSA-4vg2-xjqj-7chj x_refsource_CONFIRM
- https://github.com/containers/crun/commit/1bd7f42446999b0e76bc3d575392e05c943b0b01 x_refsource_MISC
- https://github.com/containers/crun/releases/tag/1.27 x_refsource_MISC