CVE-2026-26158
Vulnerability
CVE-2026-26158
busybox: BusyBox: Arbitrary file modification and privilege escalation via unvalidated tar archive entries
ecosystem: redhat:6A 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.
References
- secalert@redhat.com: https://access.redhat.com/security/cve/CVE-2026-26158
- secalert@redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2439040
- secalert@redhat.com: https://git.busybox.net/busybox/commit/archival?id=3fb6b31c716669e12f75a2accd31bb7685b1a1cb
- secalert@redhat.com: https://nvd.nist.gov/vuln/detail/CVE-2026-26158
- secalert@redhat.com: https://www.cve.org/CVERecord?id=CVE-2026-26158
type: vendor
source: secalert@redhat.com
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
| AV | Local | |
|---|---|---|
| AC | High | |
| PR | None | |
| UI | Required | |
| S | Not Changed | |
| C | High | |
| I | High | |
| A | High |
source: secalert@redhat.com
External Control of File Name or Path
source: secalert@redhat.com
published: 2026-02-11 00:00:00
modified: 2026-02-12 15:39:51
Detection
redhat-vex
OR
 
busybox
package type: binary
 
busybox-petitboot
package type: binary
 
busybox
package type: source
tag: rhel-6-els:23ad430c-409a-10af-658c-0679430b4aea
OR
 
busybox
package type: binary
 
busybox-petitboot
package type: binary
 
busybox
package type: source
tag: rhel-6-extras-including-unpatched:23ad430c-409a-10af-658c-0679430b4aea
OR
 
busybox
package type: binary
 
busybox-petitboot
package type: binary
 
busybox
package type: source
tag: rhel-6-including-unpatched:23ad430c-409a-10af-658c-0679430b4aea
OR
 
busybox
package type: binary
 
busybox-petitboot
package type: binary
 
busybox
package type: source
tag: rhel-6-supplementary:23ad430c-409a-10af-658c-0679430b4aea
Data Sources
- RedHat Enterprise Linux CSAF VEX
redhat-vex