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Vulnerability record · CVE-2019-14866 · published 7 January 2020

CVE-2019-14866: Gnu cpio improper input validation vulnerability

Gnu · Cpio

In all versions of cpio before 2.13 does not properly validate input files when generating TAR archives. When cpio is used to create TAR archives from paths an attacker can write to, the resulting archive may contain files with permissions the attacker did not have or in paths he did not have access to. Extracting those archives from a high-privilege user without carefully reviewing them may lead to the compromise of the system.

7.3 CVSS 3.1 High EPSS 0.69% · top 49.3% CWE-20 · Improper input validation
7.3CVSS 3.1 base score, v2 6.9
0.69%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
8References, 4 tagged exploit
17 Jun 2026Last modified by NVD

Description

In all versions of cpio before 2.13 does not properly validate input files when generating TAR archives. When cpio is used to create TAR archives from paths an attacker can write to, the resulting archive may contain files with permissions the attacker did not have or in paths he did not have access to. Extracting those archives from a high-privilege user without carefully reviewing them may lead to the compromise of the system.

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

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14866 ExploitIssue TrackingMitigationPatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2023/06/msg00007.html
https://lists.gnu.org/archive/html/bug-cpio/2019-08/msg00003.html Mailing ListPatchThird Party Advisory
https://lists.gnu.org/archive/html/bug-cpio/2019-11/msg00000.html ExploitMailing ListThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14866 ExploitIssue TrackingMitigationPatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2023/06/msg00007.html
https://lists.gnu.org/archive/html/bug-cpio/2019-08/msg00003.html Mailing ListPatchThird Party Advisory
https://lists.gnu.org/archive/html/bug-cpio/2019-11/msg00000.html ExploitMailing ListThird Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2019-14866), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.