Upstream information

CVE-2026-84042 at MITRE

Description

A flaw was found in crun. When crun is built with libkrun and a container is started rootful with passt networking (krun.use_passt), crun can execute attacker-controlled payload from the container image with host root privileges. The issue is a regression in crun 1.29. It affects crun >= 1.29

SUSE information

Overall state of this security issue: Resolved

This issue is currently rated as having important severity.

CVSS v3 Scores
CVSS detail CNA (Red Hat) SUSE
Base Score 7.8 8.8
Vector CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack Vector Local Local
Attack Complexity High Low
Privileges Required Low Low
User Interaction None None
Scope Changed Changed
Confidentiality Impact High High
Integrity Impact High High
Availability Impact High High
CVSSv3 Version 3.1 3.1
CVSS v4 Scores
CVSS detail SUSE
Base Score 8.8
Vector CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Attack Vector Local
Attack Complexity Low
Attack Requirements Present
Privileges Required Low
User Interaction None
Vulnerable System Confidentiality Impact High
Vulnerable System Integrity Impact High
Vulnerable System Availability Impact High
Subsequent System Confidentiality Impact High
Subsequent System Integrity Impact High
Subsequent System Availability Impact High
CVSSv4 Version 4.0
SUSE Bugzilla entry: 1279949 [RESOLVED / FIXED]

No SUSE Security Announcements cross referenced.

Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.

Product(s) Source package State
Products under general support and receiving all security fixes.
SUSE Linux Micro 6.0 crun Not affected
SUSE Linux Micro 6.1 crun Not affected

SUSE Timeline for this CVE

CVE page created: Thu Sep 10 14:58:35 2026
CVE page last modified: Fri Sep 11 19:41:34 2026