CVE-2026-26158

Busybox: busybox: arbitrary file modification and privilege escalation via unvalidated tar archive entries

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.

Affected

Red Hat · Red Hat Hardened Images · Red Hat Enterprise Linux 6

CVSS v3.1 CNA

7.0 HIGHCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS

0.20% chance of exploitation in the next 30 days, 9th percentile

Published

2026-02-11

Updated

2026-07-15

Proof-of-concept exploits (1)

• calilkhalil/research1★ · 2026-02-11

References

• CVE Record
• NVD entry

Related

• CVE-2026-26157