Link following in crun - CVE-2026-88264
Published: September 24, 2026
Vulnerability identifier: #VU151955
CSH Severity: Low
CVSS v4: 2.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-88264
CWE-ID: CWE-59
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to create a root-owned file outside the container root file system.
The vulnerability exists due to improper link resolution in the /dev/console setup when setting up terminal support. A remote attacker can provide a container root file system containing a malicious /dev/console symlink to create a root-owned file outside the container root file system.
Exploitation requires rootful crun, terminal support enabled, and a /dev configuration that preserves the malicious root file system entry during device setup.
Affected software
crun
How to mitigate CVE-2026-88264
Install security update from vendor's website.
crun - update to 1.30