CVE-2026-26158

EUVD-2026-7020
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7 HIGH
LOCAL
HIGH
NONE
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 5%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
SiemensRUGGEDCOM RST2428P
𝑥
< V4.0
ADP
Debian logo
Debian Releases
Debian Product
Codename
busybox
bookworm
no-dsa
bullseye
postponed
bullseye (security)
vulnerable
forky
1:1.37.0-10.1
fixed
sid
1:1.38.0-1
fixed
trixie
no-dsa
openSUSE logo
openSUSE / SLES Releases
openSUSE Product
Release
busybox
suse enterprise desktop 15 SP7
1.37.0-150700.18.15.1
fixed
suse enterprise sap 15 SP5
1.37.0-150500.10.17.1
fixed
suse enterprise sap 15 SP6
1.37.0-150500.10.17.1
fixed
suse enterprise sap 15 SP7
1.37.0-150700.18.15.1
fixed
suse enterprise server 15 SP4
1.35.0-150400.3.14.1
fixed
suse enterprise server 15 SP5
1.37.0-150500.10.17.1
fixed
suse enterprise server 15 SP6
1.37.0-150500.10.17.1
fixed
suse enterprise server 15 SP7
1.37.0-150700.18.15.1
fixed
busybox-static
suse enterprise desktop 15 SP7
1.37.0-150700.18.15.1
fixed
suse enterprise sap 15 SP5
1.37.0-150500.10.17.1
fixed
suse enterprise sap 15 SP6
1.37.0-150500.10.17.1
fixed
suse enterprise sap 15 SP7
1.37.0-150700.18.15.1
fixed
suse enterprise server 15 SP4
1.35.0-150400.3.14.1
fixed
suse enterprise server 15 SP5
1.37.0-150500.10.17.1
fixed
suse enterprise server 15 SP6
1.37.0-150500.10.17.1
fixed
suse enterprise server 15 SP7
1.37.0-150700.18.15.1
fixed
Azure Linux logo
Azure Linux Releases
Azure Package
Release
busybox
Azure Linux 3.0
0:1.36.1-22.azl3
fixed
CBL-Mariner 2.0
0:1.35.0-17.cm2
fixed
Common Weakness Enumeration
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://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://cert-portal.siemens.com/productcert/html/ssa-253495.html
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-26158.json