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Vulnerability record · CVE-2021-43565 · published 6 September 2022

CVE-2021-43565: Golang ssh vulnerability

Golang · Ssh

The x/crypto/ssh package before 0.0.0-20211202192323-5770296d904e of golang.org/x/crypto allows an attacker to panic an SSH server.

7.5 CVSS 3.1 High EPSS 1.1% · top 35.2%
7.5CVSS 3.1 base score
1.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

The x/crypto/ssh package before 0.0.0-20211202192323-5770296d904e of golang.org/x/crypto allows an attacker to panic an SSH server.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://groups.google.com/forum/#%21forum/golang-announce
https://groups.google.com/g/golang-announce/c/2AR1sKiM-Qs Issue TrackingMailing ListThird Party Advisory
https://groups.google.com/forum/#%21forum/golang-announce
https://groups.google.com/g/golang-announce/c/2AR1sKiM-Qs Issue TrackingMailing ListThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.5CVE-2022-27191Golang ssh vulnerabilityThe golang.org/x/crypto/ssh package before 0.0.0-20220314234659-1baeb1ce4c0b for Go allows an attacker to crash a server in certain circumstances inv…EPSS 3.9%7.5CVE-2020-29652Golang ssh null pointer dereference vulnerabilityA nil pointer dereference in the golang.org/x/crypto/ssh component through v0.0.0-20201203163018-be400aefbc4c for Go allows remote attackers to cause…EPSS 3.3%

Source: NIST National Vulnerability Database (record CVE-2021-43565), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.