Description
crun is an open source OCI Container Runtime fully written in C. In affected versions A malicious container image could trick the krun handler into escaping the root filesystem, allowing file creation or modification on the host. No special permissions are needed, only the ability for the current user to write to the target file. The problem is fixed in crun 1.20 and all users are advised to upgrade. There are no known workarounds for this vulnerability.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| containers | crun | < 1.20 | — |
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.
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 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLE Micro 6.0 | crun | 1.14-2.1 | SUSE-SU-2026:20452-1 |
| SUSE Package Hub 15 SP6 | crun | 1.20-bp156.2.3.1 | openSUSE-SU-2025:0074-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | crun | 1.20-1.1 | openSUSE-SU-2025:14763-1 |
| openSUSE Leap 15.6 | crun | 1.20-bp156.2.3.1 | openSUSE-SU-2025:0074-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | crun | 1.20-r0 | — |
| Alpine v3.23 | crun | 1.20-r0 | — |
| Alpine v3.22 | crun | 1.20-r0 | — |
| Alpine v3.21 | crun | 1.20-r0 | — |
Advisories 4
- SUSE-SU-2026:20452-1 Security update for crun SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2025:14763-1 crun-1.20-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2025:0074-1 Security update for crun SUSE / openSUSE Security Updates · Feb 4, 2026
- VDE-2025-053 Phoenix Contact: Multiple Vulnerabilities in PLCnext Firmware CERT@VDE · Jul 8, 2025