Is CVE-2021-3411 in the CISA KEV catalog?

No. CVE-2021-3411 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-3411?

CVE-2021-3411 has a CVSS v3 base score of 6.7 (MEDIUM).

What is the EPSS score for CVE-2021-3411?

CVE-2021-3411 has an EPSS score of 0.40% (32th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-3411?

Upgrade linux on debian 11 to 5.9.15-1 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2021-3411

MEDIUM

6.7

CVSS v3

NVD

Description

A flaw was found in the Linux kernel in versions prior to 5.10. A violation of memory access was found while detecting a padding of int3 in the linking state. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

CWE-94Code Injection

How to fix

Remediation Available

linuxDebian

Fixed in:5.9.15-1CVE-2021-3411

linux-image-5.6.0-1053-oemUbuntu

Fixed in:5.6.0-1053.57USN-4912-1

linux-image-oem-20.04Ubuntu

Fixed in:5.6.0.1053.49USN-4912-1

linux-oem-5.6Ubuntu

Fixed in:5.6.0-1053.57USN-4912-1

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 RequiredHigh

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.40%probability of exploitation in 30 days

32ndpercentile

Low risk: more likely to be exploited than 32% of all known CVEs.

References

Patch1

blog.pi3.com.pl

Exploit1

bugzilla.redhat.com

Related Vulnerabilities

Other CWE-94 (Code Injection) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2017-9841	Critical	9.8	100%	KEV	Fix
CVE-2015-1635	Critical	9.8	100%	KEV	-
CVE-2022-22954	Critical	9.8	100%	KEV + Ransom	-
CVE-2021-22204	Medium	6.8	100%	KEV	Fix
CVE-2025-3248	Critical	9.8	100%	KEV	Fix
CVE-2012-0158	High	8.8	100%	KEV	-

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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.