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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.

PUBLISHED Reserved 2026-02-11 | Published 2026-02-11 | Updated 2026-02-12 | Assigner redhat




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

Problem types

External Control of File Name or Path

Product status

Default status
unknown

Timeline

2026-02-11:Reported to Red Hat.
2026-02-11:Made public.

References

access.redhat.com/security/cve/CVE-2026-26158 vdb-entry

bugzilla.redhat.com/show_bug.cgi?id=2439040 (RHBZ#2439040) issue-tracking

git.busybox.net/...=3fb6b31c716669e12f75a2accd31bb7685b1a1cb

cve.org (CVE-2026-26158)

nvd.nist.gov (CVE-2026-26158)

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