Is CVE-2020-22218 in the CISA KEV catalog?

No. CVE-2020-22218 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-22218?

CVE-2020-22218 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2020-22218?

CVE-2020-22218 has an EPSS score of 0.91% (56th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-22218?

Upgrade libssh2 on debian 11 to 1.9.0-2+deb11u1 or later. Fixes are available for 11 affected products.

CVE & CISA-KEV Catalog

CVE-2020-22218

HIGH

7.5

CVSS v3

NVD

Description

An issue was discovered in function _libssh2_packet_add in libssh2 1.10.0 allows attackers to access out of bounds memory.

CWE-787Out-of-bounds Write

How to fix

Remediation Available

libssh2Debian

Fixed in:1.9.0-2+deb11u1CVE-2020-22218

Fixed in:1.10.0-2CVE-2020-22218

libssh2Red Hat / RHEL

Fixed in:0:1.8.0-4.el7_9.1RHSA-2023:5615

Fixed in:0:1.8.0-4.el7_9.1.s390RHSA-2023:5615

Fixed in:0:1.8.0-4.el7_9.1RHSA-2023:5615

Fixed in:0:1.8.0-4.el7_9.1.ppcRHSA-2023:5615

Fixed in:0:1.8.0-4.el7_9.1.ppc64RHSA-2023:5615

libssh2Rocky

Fixed in:0:1.8.0-4.el7_9.1RHSA-2023:5615

Fixed in:0:1.8.0-4.el7_9.1.s390RHSA-2023:5615

Fixed in:0:1.8.0-4.el7_9.1.ppc64RHSA-2023:5615

Fixed in:0:1.8.0-4.el7_9.1.ppcRHSA-2023:5615

Fixed in:0:1.8.0-4.el7_9.1RHSA-2023:5615

libssh2-debuginfoRocky

Fixed in:0:1.8.0-4.el7_9.1.ppc64RHSA-2023:5615

Fixed in:0:1.8.0-4.el7_9.1RHSA-2023:5615

Fixed in:0:1.8.0-4.el7_9.1.ppcRHSA-2023:5615

Fixed in:0:1.8.0-4.el7_9.1.s390RHSA-2023:5615

Fixed in:0:1.8.0-4.el7_9.1RHSA-2023:5615

libssh2-debuginfoRed Hat / RHEL

Fixed in:0:1.8.0-4.el7_9.1RHSA-2023:5615

Fixed in:0:1.8.0-4.el7_9.1.ppcRHSA-2023:5615

Fixed in:0:1.8.0-4.el7_9.1.ppc64RHSA-2023:5615

Fixed in:0:1.8.0-4.el7_9.1.s390RHSA-2023:5615

Fixed in:0:1.8.0-4.el7_9.1RHSA-2023:5615

libssh2-develRed Hat / RHEL

Fixed in:0:1.8.0-4.el7_9.1.ppcRHSA-2023:5615

Fixed in:0:1.8.0-4.el7_9.1RHSA-2023:5615

Fixed in:0:1.8.0-4.el7_9.1.s390RHSA-2023:5615

Fixed in:0:1.8.0-4.el7_9.1RHSA-2023:5615

Fixed in:0:1.8.0-4.el7_9.1.ppc64RHSA-2023:5615

Fixed in:0:1.8.0-4.el7_9.1RHSA-2023:5615

libssh2-develRocky

Fixed in:0:1.8.0-4.el7_9.1.ppc64RHSA-2023:5615

Fixed in:0:1.8.0-4.el7_9.1RHSA-2023:5615

Fixed in:0:1.8.0-4.el7_9.1.s390RHSA-2023:5615

Fixed in:0:1.8.0-4.el7_9.1RHSA-2023:5615

Fixed in:0:1.8.0-4.el7_9.1.ppcRHSA-2023:5615

libssh2-docsRocky

Fixed in:0:1.8.0-4.el7_9.1RHSA-2023:5615

libssh2-docsRed Hat / RHEL

Fixed in:0:1.8.0-4.el7_9.1RHSA-2023:5615

libssh2Ubuntu

Fixed in:1.4.3-2ubuntu0.2+esm3USN-6371-1

Fixed in:1.5.0-2ubuntu0.1+esm2USN-6371-1

Fixed in:1.8.0-1ubuntu0.1USN-6371-1

Fixed in:1.8.0-2.1ubuntu0.1USN-6371-1

libssh2-1Ubuntu

Fixed in:1.4.3-2ubuntu0.2+esm3USN-6371-1

Fixed in:1.5.0-2ubuntu0.1+esm2USN-6371-1

Fixed in:1.8.0-1ubuntu0.1USN-6371-1

Fixed in:1.8.0-2.1ubuntu0.1USN-6371-1

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 VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

0.91%probability of exploitation in 30 days

56thpercentile

Moderate risk: more likely to be exploited than 56% of all known CVEs.

References

Patch1

github.com

Other references2

Related Vulnerabilities

Other CWE-787 (Out-of-bounds Write) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-22457	Critical	9.0	100%	KEV + Ransom	Fix
CVE-2025-0282	Critical	9.0	100%	KEV + Ransom	-
CVE-2015-3113	Critical	9.8	100%	KEV	Fix
CVE-2021-20038	Critical	9.8	100%	KEV + Ransom	-
CVE-2023-4863	High	8.8	100%	KEV	Fix
CVE-2020-16040	Medium	6.5	100%	-	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.