CVE-2026-108119
mediumpriority · track · 25EPSS 0.001 · 3 %ileDEUSEPSS · scored 2026-10-27
A flaw was found in busybox. The tar applet's deferred link-creation handling for symlink and hardlink entries with unsafe-looking targets does not validate that the resolved destination remains inside the extraction directory once the deferred link is created. An attacker can craft a tar archive using a symlink target of exactly '..' combined with a deferred hardlink to create a new file outside the extraction directory, or reuse an extraction directory across two archives to replace an existing file outside it. If the archive is extracted with elevated privileges, this flaw can lead to privilege escalation or arbitrary code execution.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (1)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- WID-SEC-W-2026-3853BusyBox: Schwachstelle ermöglicht CodeausführungDeutsch2026-10-11csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in BusyBox ausnutzen, um beliebigen Programmcode auszuführen und Nutzerrechte zu erlangen.
sources
Which sources assert this record, and when.
references (3) nvd
External citations — patches, advisories, analysis.
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