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.
Metrics
Affected Vendors & Products
References
History
Tue, 13 Oct 2026 18:30:00 +0000
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ssvc
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Mon, 12 Oct 2026 21:15:00 +0000
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Sun, 11 Oct 2026 12:45:00 +0000
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Busybox
Busybox busybox Redhat hardened Images |
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Busybox
Busybox busybox Redhat hardened Images |
Sat, 10 Oct 2026 00:30:00 +0000
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threat_severity
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threat_severity
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Fri, 09 Oct 2026 17:00:00 +0000
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| Description | 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. | |
| Title | Busybox: busybox: tar extraction-root escape via deferred symlink/hardlink creation bypasses cve-2026-26158 fix | |
| First Time appeared |
Redhat
Redhat enterprise Linux Redhat hummingbird |
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| Weaknesses | CWE-59 | |
| CPEs | cpe:/a:redhat:hummingbird:1 cpe:/o:redhat:enterprise_linux:6 |
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| Vendors & Products |
Redhat
Redhat enterprise Linux Redhat hummingbird |
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| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: redhat
Published: 2026-10-09T16:45:59.735Z
Updated: 2026-10-13T16:59:20.957Z
Reserved: 2026-10-09T14:09:13.658Z
Link: CVE-2026-108119
Updated: 2026-10-13T16:59:15.646Z
Status : Awaiting Analysis
Published: 2026-10-09T17:16:46.400
Modified: 2026-10-13T17:17:19.397
Link: CVE-2026-108119