VulnerabilityAwaiting Analysis

CVE-2026-88265

Default configurations that mount a fresh /dev are not exposed.

MEDIUM 5.6EPSS 0.12%

Does this matter?

Lower severity and a low EPSS score (0.12%). Track it; it rarely justifies an emergency change on its own.

Description

A flaw was found in crun. After pivot_root, reopening /dev/null for stdio can follow a symlink and attach a host file to container stdio, then change that file's ownership. Affected versions are crun 1.29.1 and earlier. Default configurations that mount a fresh /dev are not exposed. No fixed release is available yet.

CVSS 3.1: 5.6 MEDIUMCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:N
EPSS: 0.12% probability · 2th percentile
CISA KEV: Not listed
Weakness: CWE-59
Source: secalert@redhat.com

References

https://access.redhat.com/security/cve/CVE-2026-88265
https://bugzilla.redhat.com/show_bug.cgi?id=2531224
https://github.com/containers/crun/

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.