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Vulnerability record · CVE-2021-20271 · published 26 March 2021

CVE-2021-20271: Rpm insufficient verification of data authenticity vulnerability

Rpm · Rpm

A flaw was found in RPM's signature check functionality when reading a package file. This flaw allows an attacker who can convince a victim to install a seemingly verifiable package, whose signature header was modified, to cause RPM database corruption and execute code. The highest threat from this vulnerability is to data integrity, confidentiality, and system availability.

7.0 CVSS 3.1 High EPSS 0.79% · top 45.3% CWE-345 · Insufficient verification of data authenticity
7.0CVSS 3.1 base score, v2 5.1
0.79%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
14References
17 Jun 2026Last modified by NVD

Description

A flaw was found in RPM's signature check functionality when reading a package file. This flaw allows an attacker who can convince a victim to install a seemingly verifiable package, whose signature header was modified, to cause RPM database corruption and execute code. The highest threat from this vulnerability is to data integrity, confidentiality, and system availability.

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

Affected products

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

References

LinkTags
https://bugzilla.redhat.com/show_bug.cgi?id=1934125 Issue TrackingPatchThird Party Advisory
https://github.com/rpm-software-management/rpm/commit/d6a86b5e69e46cc283b1e06c92343319beb42e21 PatchThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TMGXO3W6DHPO62GJ4VVF5DE
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VHRPNBCRPDJHHQE3MBPSZK4
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YILPBTPSBRYL4POBI3F4YUS
https://security.gentoo.org/glsa/202107-43 Third Party Advisory
https://www.starwindsoftware.com/security/sw-20220805-0002/ Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1934125 Issue TrackingPatchThird Party Advisory
https://github.com/rpm-software-management/rpm/commit/d6a86b5e69e46cc283b1e06c92343319beb42e21 PatchThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TMGXO3W6DHPO62GJ4VVF5DE
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VHRPNBCRPDJHHQE3MBPSZK4
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YILPBTPSBRYL4POBI3F4YUS
https://security.gentoo.org/glsa/202107-43 Third Party Advisory
https://www.starwindsoftware.com/security/sw-20220805-0002/ Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2021-20271), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.