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Vulnerability record · CVE-2021-35939 · published 26 August 2022

CVE-2021-35939: Rpm link following vulnerability

Rpm · Rpm

It was found that the fix for CVE-2017-7500 and CVE-2017-7501 was incomplete: the check was only implemented for the parent directory of the file to be created. A local unprivileged user who owns another ancestor directory could potentially use this flaw to gain root privileges. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

6.7 CVSS 3.1 Medium EPSS 0.50% · top 58.4% CWE-59 · Link following
6.7CVSS 3.1 base score
0.50%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
12References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

It was found that the fix for CVE-2017-7500 and CVE-2017-7501 was incomplete: the check was only implemented for the parent directory of the file to be created. A local unprivileged user who owns another ancestor directory could potentially use this flaw to gain root privileges. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/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://access.redhat.com/security/cve/CVE-2021-35939 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1964129 ExploitIssue TrackingThird Party Advisory
https://github.com/rpm-software-management/rpm/commit/96ec957e281220f8e137a2d5eb23b83a6377d556 PatchThird Party Advisory
https://github.com/rpm-software-management/rpm/pull/1919 PatchThird Party Advisory
https://rpm.org/wiki/Releases/4.18.0 Release NotesVendor Advisory
https://security.gentoo.org/glsa/202210-22 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2021-35939 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1964129 ExploitIssue TrackingThird Party Advisory
https://github.com/rpm-software-management/rpm/commit/96ec957e281220f8e137a2d5eb23b83a6377d556 PatchThird Party Advisory
https://github.com/rpm-software-management/rpm/pull/1919 PatchThird Party Advisory
https://rpm.org/wiki/Releases/4.18.0 Release NotesVendor Advisory
https://security.gentoo.org/glsa/202210-22 Third Party Advisory

Track CVE-2021-35939 inside VULONE

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-35939), CISA KEV, FIRST EPSS (scores of 2026-10-17). This page is refreshed as NVD updates the record.