Busybox: busybox: arbitrary file modification and privilege escalation via unvalidated tar archive entries (Red Hat Red Hat Hardened Images)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.19 % · percentile 9 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- redhat
- NVD status
- Deferred
Description
A flaw was found in BusyBox. This vulnerability allows an attacker to modify files outside of the intended extraction directory by crafting a malicious tar archive containing unvalidated hardlink or symlink entries. If the tar archive is extracted with elevated privileges, this flaw can lead to privilege escalation, enabling an attacker to gain unauthorized access to critical system files.
Weaknesses (CWE)
- CWE-73 — External Control of File Name or Path
References
- https://access.redhat.com/errata/RHSA-2026:13831
- https://access.redhat.com/security/cve/CVE-2026-26158
- https://bugzilla.redhat.com/show_bug.cgi?id=2439040
- https://git.busybox.net/busybox/commit/archival?id=3fb6b31c716669e12f75a2accd31bb7685b1a1cb
- https://cert-portal.siemens.com/productcert/html/ssa-253495.html
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-26158.json
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.0 | CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H | redhat |
| CVSS 3.1 | HIGH 7.0 | CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H | redhat-SADP |
| CVSS 3.1 | HIGH 7.0 | CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H | NVD · secalert@redhat.com (Secondary) |
| CVSS 3.1 | HIGH 7.0 | CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H | NVD · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Secondary) |
European references
- ENISA EUVD · EUVD-2026-7020
- GCVE · GCVE-0-2026-26158
CERT-FR advisories
- CERTFR-2026-AVI-0326 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0316 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
Affected products
| Product | Versions |
|---|---|
| Red Hat · Red Hat Hardened Images | unaffected 1.37.0-7.2.hum1 < * |
| Red Hat · Red Hat Enterprise Linux 6 |
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 |