CVE-2026-88265

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

5.6CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:N

EPSS

0.1% chance of exploitation in the next 30 days; higher than 1% of CVEs (scores of 2026-10-25)

CWE

CWE-59

Published

2026-09-10

Modified

2026-10-02

Record from

the NVD, synced 2026-10-19

References

• https://access.redhat.com/errata/RHSA-2026:71668
• https://access.redhat.com/security/cve/CVE-2026-88265
• https://bugzilla.redhat.com/show_bug.cgi?id=2531224
• https://github.com/containers/crun/

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