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Vulnerability record · CVE-2020-29652 · published 17 December 2020

CVE-2020-29652: Golang ssh null pointer dereference vulnerability

Golang · Ssh

A nil pointer dereference in the golang.org/x/crypto/ssh component through v0.0.0-20201203163018-be400aefbc4c for Go allows remote attackers to cause a denial of service against SSH servers.

7.5 CVSS 3.1 High EPSS 3.3% · top 12.1% CWE-476 · NULL pointer dereference
7.5CVSS 3.1 base score, v2 5.0
3.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

Description

A nil pointer dereference in the golang.org/x/crypto/ssh component through v0.0.0-20201203163018-be400aefbc4c for Go allows remote attackers to cause a denial of service against SSH servers.

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://go-review.googlesource.com/c/crypto/+/278852 Third Party Advisory
https://groups.google.com/g/golang-announce/c/ouZIlBimOsE?pli=1 Third Party Advisory
https://lists.apache.org/thread.html/r68032132c0399c29d6cdc7bd44918535da54060a10a12b1591328bff%40%3Cnotifications.skywal
https://go-review.googlesource.com/c/crypto/+/278852 Third Party Advisory
https://groups.google.com/g/golang-announce/c/ouZIlBimOsE?pli=1 Third Party Advisory
https://lists.apache.org/thread.html/r68032132c0399c29d6cdc7bd44918535da54060a10a12b1591328bff%40%3Cnotifications.skywal

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Related vulnerabilities

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

7.5CVE-2021-43565Golang ssh vulnerabilityThe x/crypto/ssh package before 0.0.0-20211202192323-5770296d904e of golang.org/x/crypto allows an attacker to panic an SSH server.EPSS 1.1%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%6.2CVE-2026-21525Windows Remote Access Connection Manager null pointer dereference DoSWindows Remote Access Connection Manager contains a null pointer dereference (CWE-476) that lets an unauthorized attacker deny service locally. The f…KEVEPSS 4.8%analysed

Source: NIST National Vulnerability Database (record CVE-2020-29652), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.