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Fencer Vulns
none 0.0

CVE-2026-30892 json

Crun incorrectly parses `crun exec` option `-u`, leading to privilege escalation

published 2026-03-25 7 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-16026

cvss
0.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 5%
public exploits
0
none known

Summary

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.

Patch / fix

  • crun_project crun 1.27
  • crun Debian 14 1.27-1

debian advisories DEBIAN-CVE-2026-30892

  • crun RHEL 9 1.27-1.el9_8
  • crun RHEL 10.2 1.27-2.el10_2
  • crun-krun RHEL 10.2 1.27-2.el10_2
  • crun RHEL 10.1 1.27-1.el10_1
  • crun RHEL 9 1.27-1.el9_7
  • crun enterprise linux eus 10.0 1.27.1-1.el10_0
  • container-selinux enterprise linux eus 10.0 4:2.246.0-1.el10_0
  • crun RHEL 9.6 EUS 1.27-1.el9_6

red hat advisories RHSA-2026:47905RHSA-2026:28036RHSA-2026:19178RHSA-2026:19020RHSA-2026:6622RHSA-2026:6621

  • crun openSUSE Tumbleweed 1.27-1.1

opensuse advisories openSUSE-SU-2026:10524-1

  • crun AlmaLinux 10 1.27-2.el10_2
  • crun-krun AlmaLinux 10 1.27-2.el10_2
  • crun AlmaLinux 9 1.27-1.el9_8
  • crun AlmaLinux 9 1.27-1.el9_7
  • crun AlmaLinux 10 1.27-1.el10_1

almalinux advisories ALSA-2026:19020ALSA-2026:19178ALSA-2026:6621ALSA-2026:6622

  • crun Rocky Linux 10 1.27-2.el10_2
  • crun Rocky Linux 9 1.27-1.el9_7
  • crun Rocky Linux 10 1.27-1.el10_1

rocky linux advisories RLSA-2026:19020RLSA-2026:19178RLSA-2026:6622RLSA-2026:6621

  • crun Alpine 3.24, Alpine 3.23 1.27-r0

alpine advisories ALPINE-CVE-2026-30892

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-30892 updated cvss 7.8

crun: crun: Privilege escalation due to incorrect parsing of the `--user` option

  • Red Hat OpenShift Container Platform 4 crun
    affected: workaround, no fix available
  • Red Hat Enterprise Linux AppStream (v. 9) crun 1.27-1.el9_7, crun 1.27-1.el9_8
    fixed: vendor fix RHSA-2026:6621
  • Red Hat Enterprise Linux AppStream (v. 10) crun 1.27-1.el10_1, crun 1.27-2.el10_2, crun-krun 1.27-2.el10_2
    fixed: vendor fix RHSA-2026:6622
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) crun 1.27.1-1.el10_0, container-selinux 2.246.0-1.el10_0
    fixed: vendor fix RHSA-2026:47905
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) crun 1.27-1.el9_6
    fixed: vendor fix RHSA-2026:28036
  • Red Hat OpenShift Container Platform 4.19 rhcos 4.19.9.6.202606302000
    fixed: vendor fix RHSA-2026:34757
  • Red Hat Enterprise Linux 8 crun Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
7 mo ago

Exploit prediction

0.17% chance of exploitation in the next 30 days, higher than 5% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/containers/crun/security/advisories/GHSA-4vg2-xjqj-7chj referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 0.0 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • containers crun

Classification

Weakness
  • CWE-269 Improper Privilege Management

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.