Is CVE-2021-4115 in the CISA KEV catalog?

No. CVE-2021-4115 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-4115?

CVE-2021-4115 has a CVSS v3 base score of 5.5 (MEDIUM).

What is the EPSS score for CVE-2021-4115?

CVE-2021-4115 has an EPSS score of 0.53% (41th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-4115?

Upgrade policykit-1 on debian 11 to 0.105-31+deb11u2 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2021-4115

MEDIUM

5.5

CVSS v3

NVD

Description

There is a flaw in polkit which can allow an unprivileged user to cause polkit to crash, due to process file descriptor exhaustion. The highest threat from this vulnerability is to availability. NOTE: Polkit process outage duration is tied to the failing process being reaped and a new one being spawned

CWE-400Resource Exhaustion

How to fix

Remediation Available

policykit-1Debian

Fixed in:0.105-31+deb11u2CVE-2021-4115

Fixed in:0.105-32CVE-2021-4115

policykit-1Ubuntu

Fixed in:0.105-26ubuntu1.3USN-5304-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

0.53%probability of exploitation in 30 days

41stpercentile

Moderate risk: more likely to be exploited than 41% of all known CVEs.

References

Patch3

Third-Party Advisory1

access.redhat.com

Other references2

Related Vulnerabilities

Other CWE-400 (Resource Exhaustion) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-44487	High	7.5	100%	KEV	Fix
CVE-2021-44228	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2011-3192	High	7.8	99%	-	Fix
CVE-2019-11478	Medium	5.3	95%	-	Fix
CVE-2024-25617	Medium	5.3	89%	-	Fix
CVE-2018-1000115	High	7.5	89%	-	Fix

Embed a live status badge for CVE-2021-4115

Markdown

[![CVE-2021-4115](https://tridentstack.com/cve/badge/CVE-2021-4115.svg)](https://tridentstack.com/cve/CVE-2021-4115)

HTML

<a href="https://tridentstack.com/cve/CVE-2021-4115"><img src="https://tridentstack.com/cve/badge/CVE-2021-4115.svg" alt="CVE-2021-4115"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.