CVE-2026-88265CWE-59

CVE-2026-88265

Medium · published September 10, 2026

CVSS v3.1
5.6
EPSS
0%
Percentile
1.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.6 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00121 · 1.8th percentile
Weakness
CWE-59 · Improper Link Resolution Before File Access ('Link Following')
Published
2026-09-10T13:17Z
References (4)
https://access.redhat.com/errata/RHSA-2026:71668 · [email protected]https://access.redhat.com/security/cve/CVE-2026-88265 · [email protected]https://bugzilla.redhat.com/show_bug.cgi?id=2531224 · [email protected]https://github.com/containers/crun/ · [email protected]
EPSS history
Timeline
  • 11 SEP 03:19Z
    EPSS moved — → 0%
    epss
  • 10 SEP 08:57Z
    Crun: crun: /dev/null symlink follow during stdio reopen allows host bind-mount write and chown
    cvelistv5