Kata Containers: CopyFile Policy Subversion via Symlinks (kata-containers kata-containers)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.35 % · percentile 28 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- GitHub_M
- NVD status
- Modified
Description
Kata Containers is an open source project focusing on a standard implementation of lightweight Virtual Machines (VMs) that perform like containers. From v3.4.0 to v3.28.0, an oversight in the CopyFile policy (and perhaps the CopyFile handler) allows untrusted hosts to write to arbitrary locations inside the guest workload image. This can be used to overwrite binaries inside the guest and exfiltrate data from containers; even those running inside CVMs. This vulnerability is fixed in v3.29.0.
Weaknesses (CWE)
- CWE-61 — UNIX Symbolic Link (Symlink) Following
- CWE-1220 — Insufficient Granularity of Access Control
References
- https://github.com/kata-containers/kata-containers/security/advisories/GHSA-q49m-57vm-c8cc
- https://github.com/kata-containers/kata-containers/commit/1b9e49eb2763aa6ea6a99b276d3ff5e2c7f658f2
- http://www.openwall.com/lists/oss-security/2026/05/13/2
- https://access.redhat.com/security/cve/CVE-2026-41326
- https://bugzilla.redhat.com/show_bug.cgi?id=2460859
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-41326.json
- https://access.redhat.com/errata/RHSA-2026:25200
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 4.0 | HIGH 8.2 | CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:H/SI:N/SA:N | GitHub_M |
| CVSS 3.1 | HIGH 8.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H | redhat-SADP |
| CVSS 4.0 | HIGH 8.2 | CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | NVD · security-advisories@github.com (Secondary) |
| CVSS 3.1 | HIGH 8.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N | NVD · nvd@nist.gov (Primary) |
| CVSS 3.1 | HIGH 8.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H | NVD · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Secondary) |
Advisories
- GHSA-q49m-57vm-c8cc — Kata Container has CopyFile Policy Subversion via Symlinks
- GO-2026-5563 — Kata Container has CopyFile Policy Subversion via Symlinks in github.com/kata-containers/kata-containers
European references
- ENISA EUVD · EUVD-2026-25611
- GCVE · GCVE-0-2026-41326
CERT-FR advisories
- CERTFR-2026-AVI-0781 — Multiples vulnérabilités dans le noyau Linux de Red Hat · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:katacontainers:confidential_containers:*:*:*:*:*:*:*:*≥ 0.9.0 < 0.20.0cpe:2.3:a:katacontainers:kata_containers:*:*:*:*:*:*:*:*≥ 3.4.0 < 3.29.0
Affected products
| Product | Versions |
|---|---|
| kata-containers · kata-containers | affected >= 3.4.0, < 3.29.0 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |