Is CVE-2021-39636 in the CISA KEV catalog?

No. CVE-2021-39636 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-39636?

CVE-2021-39636 has a CVSS v3 base score of 4.4 (MEDIUM).

What is the EPSS score for CVE-2021-39636?

CVE-2021-39636 has an EPSS score of 0.22% (13th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-39636?

Upgrade linux on debian 11 to 4.16.5-1 or later. Fixes are available for 18 affected products.

CVE & CISA-KEV Catalog

CVE-2021-39636

MEDIUM

4.4

CVSS v3

NVD

Description

In do_ipt_get_ctl and do_ipt_set_ctl of ip_tables.c, there is a possible way to leak kernel information due to uninitialized data. This could lead to local information disclosure with system execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-120612905References: Upstream kernel

CWE-665

How to fix

Remediation Available

linuxDebian

Fixed in:4.16.5-1CVE-2021-39636

linuxUbuntu

Fixed in:4.4.0-223.256USN-5361-1

linux-awsUbuntu

Fixed in:4.4.0-1103.108USN-5361-1

Fixed in:4.4.0-1139.153USN-5361-1

linux-image-4.4.0-1103-awsUbuntu

Fixed in:4.4.0-1103.108USN-5361-1

linux-image-4.4.0-1104-kvmUbuntu

Fixed in:4.4.0-1104.113USN-5361-1

linux-image-4.4.0-1139-awsUbuntu

Fixed in:4.4.0-1139.153USN-5361-1

linux-image-4.4.0-223-genericUbuntu

Fixed in:4.4.0-223.256~14.04.1USN-5361-1

Fixed in:4.4.0-223.256USN-5361-1

linux-image-4.4.0-223-lowlatencyUbuntu

Fixed in:4.4.0-223.256~14.04.1USN-5361-1

Fixed in:4.4.0-223.256USN-5361-1

linux-image-awsUbuntu

Fixed in:4.4.0.1103.101USN-5361-1

Fixed in:4.4.0.1139.144USN-5361-1

linux-image-genericUbuntu

Fixed in:4.4.0.223.230USN-5361-1

linux-image-generic-lts-xenialUbuntu

Fixed in:4.4.0.223.194USN-5361-1

linux-image-kvmUbuntu

Fixed in:4.4.0.1104.102USN-5361-1

linux-image-lowlatencyUbuntu

Fixed in:4.4.0.223.230USN-5361-1

linux-image-lowlatency-lts-xenialUbuntu

Fixed in:4.4.0.223.194USN-5361-1

linux-image-virtualUbuntu

Fixed in:4.4.0.223.230USN-5361-1

linux-image-virtual-lts-xenialUbuntu

Fixed in:4.4.0.223.194USN-5361-1

linux-kvmUbuntu

Fixed in:4.4.0-1104.113USN-5361-1

linux-lts-xenialUbuntu

Fixed in:4.4.0-223.256~14.04.1USN-5361-1

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

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

0.22%probability of exploitation in 30 days

13thpercentile

Low risk: more likely to be exploited than 13% of all known CVEs.

References

Patch1

source.android.com

Related Vulnerabilities

Other CWE-665 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2022-0847	High	7.8	88%	KEV	Fix
CVE-2022-22719	High	7.5	70%	-	Fix
CVE-2020-28019	High	7.5	61%	-	Fix
CVE-2022-46164	Critical	9.4	49%	-	Fix
CVE-2022-37128	Critical	9.8	21%	-	-
CVE-2019-14271	Critical	9.8	19%	-	Fix

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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.