CVE-2026-26158
Busybox: busybox: arbitrary file modification and privilege escalation via unvalidated tar archive entries
Vexday Risk Score
21Bajo
Decisión SSVC (CISA)
Track
Sin señal de explotación → monitorear
CVSS 7EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch referenciado
Ciclo de vida
11 feb 2026Publicada en NVD
Recomendación: Monitorear — sin señal de explotación por ahora.
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.
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
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https://access.redhat.com/errata/RHSA-2026:13831https://access.redhat.com/security/cve/CVE-2026-26158https://bugzilla.redhat.com/show_bug.cgi?id=2439040https://cert-portal.siemens.com/productcert/html/ssa-253495.htmlhttps://git.busybox.net/busybox/commit/archival?id=3fb6b31c716669e12f75a2accd31bb7685b1a1cb