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 products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| containers | crun | >= 1.19, < 1.27 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | crun | 1.27-1 | — |
| Debian 13 | crun | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | crun | No fix yet | — |
| Ubuntu 26.04 LTS | crun | No fix yet | — |
| Ubuntu 25.10 | crun | No fix yet | — |
| Ubuntu 24.04 LTS | crun | No fix yet | — |
| Ubuntu 22.04 LTS | crun | No fix yet | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | crun | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | crun | 1.27-1.el10_1 | RHSA-2026:19020, RHSA-2026:6622 |
| RHEL 10 | crun-krun | 1.27-2.el10_2 | RHSA-2026:19020 |
| RHEL 9 | crun | 1.27-1.el9_7 | RHSA-2026:19178, RHSA-2026:6621 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10.0 EUS | container-selinux | 4:2.246.0-1.el10_0 | RHSA-2026:47905 |
| RHEL 10.0 EUS | crun | 1.27.1-1.el10_0 | RHSA-2026:47905 |
| RHEL 9.6 EUS | crun | 1.27-1.el9_6 | RHSA-2026:28036 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | crun | 1.27-1.el10_1 | ALSA-2026:19020, ALSA-2026:6622 |
| AlmaLinux 10 | crun-krun | 1.27-2.el10_2 | ALSA-2026:19020 |
| AlmaLinux 9 | crun | 1.27-1.el9_7 | ALSA-2026:19178, ALSA-2026:6621 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | crun | 1.27-1.el10_1 | RLSA-2026:19020, RLSA-2026:6622 |
| Rocky Linux 9 | crun | 1.27-1.el9_7 | RLSA-2026:19178, RLSA-2026:6621 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | crun | 1.27-1.1 | openSUSE-SU-2026:10524-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | crun | 1.27-r0 | — |
| Alpine v3.23 | crun | 1.27-r0 | — |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | crun | No fix yet | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | crun | 1.27-1.el10_1 | ELSA-2026-19020, ELSA-2026-6622 |
| Oracle Linux 10 | crun-krun | 1.27-2.el10_2 | ELSA-2026-19020 |
| Oracle Linux 9 | crun | 1.27-1.el9_7 | ELSA-2026-19178, ELSA-2026-6621 |
Advisories 20
- ALSA-2026:6622 Moderate: crun security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:19178 Moderate: crun security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:6621 Moderate: crun security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:19020 Moderate: crun security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2026:6622 Red Hat Security Advisory: crun security update Red Hat Security Advisories (RHSA) · Oct 3, 2026
- RHSA-2026:6621 Red Hat Security Advisory: crun security update Red Hat Security Advisories (RHSA) · Oct 3, 2026
- RHSA-2026:47905 Red Hat Security Advisory: container-selinux and crun security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 3, 2026
- RHSA-2026:28036 Red Hat Security Advisory: crun security update Red Hat Security Advisories (RHSA) · Oct 3, 2026
- RHSA-2026:19178 Red Hat Security Advisory: crun security update Red Hat Security Advisories (RHSA) · Oct 3, 2026
- RHSA-2026:19020 Red Hat Security Advisory: crun security update Red Hat Security Advisories (RHSA) · Oct 3, 2026
- WID-SEC-2026-0966 Red Hat Enterprise Linux (crun): Schwachstelle ermöglicht Privilegieneskalation BSI CERT-Bund (WID) · Jul 29, 2026
- ELSA-2026-19020 Moderate: crun security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Jul 8, 2026
- ELSA-2026-19178 Moderate: crun security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jun 12, 2026
- RLSA-2026:19020 Moderate: crun security update Rocky Linux Security Advisories · May 29, 2026
- RLSA-2026:19178 Moderate: crun security update Rocky Linux Security Advisories · May 20, 2026
- openSUSE-SU-2026:10524-1 crun-1.27-1.1 on GA media SUSE / openSUSE Security Updates · Apr 11, 2026
- RLSA-2026:6622 Moderate: crun security update Rocky Linux Security Advisories · Apr 9, 2026
- RLSA-2026:6621 Moderate: crun security update Rocky Linux Security Advisories · Apr 8, 2026
- ELSA-2026-6622 Moderate: crun security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Apr 7, 2026
- ELSA-2026-6621 Moderate: crun security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Apr 7, 2026