VulnerabilityModified

CVE-2021-3445

This flaw allows an attacker to achieve code execution if they can alter the header information of an RPM package and then trick a user or system into installing it.

HIGH 7.5EPSS 1.12%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (1.12%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

A flaw was found in libdnf's signature verification functionality in versions before 0.60.1. This flaw allows an attacker to achieve code execution if they can alter the header information of an RPM package and then trick a user or system into installing it. The highest risk of this vulnerability is to confidentiality, integrity, as well as system availability.

CVSS 3.1: 7.5 HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS: 1.12% probability · 66th percentile
Public exploits: None in Exploit-DB
CISA KEV: Not listed
Weakness: CWE-347
Affected: rpm/libdnf · fedoraproject/fedora · redhat/enterprise linux
Source: secalert@redhat.com

EPSS trend

EPSS 1.1% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.