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.
References
Configurations
No configuration.
History
12 Oct 2026, 21:17
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09 Oct 2026, 17:16
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Information
Published : 2026-10-09 17:16
Updated : 2026-10-13 17:17
NVD link : CVE-2026-108119
Mitre link : CVE-2026-108119
CVE.ORG link : CVE-2026-108119
JSON object : View
Products Affected
No product.
CWE
CWE-59
Improper Link Resolution Before File Access ('Link Following')
