What is CVE-2020-29652?

CVE-2020-29652 is a high-severity vulnerability in Golang SSH, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2020-12-17.

How severe is CVE-2020-29652?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2020-29652 known to be exploited?

5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

NULL pointer dereference in Golang SSH

CVE-2020-29652

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.

Published 2020-12-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.032 (88.1th percentile), scored 2026-11-01.

Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 88.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.033 · newest: 0.032 · change: -0.001

Affected products

Golang SSH

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

Public proof-of-concept exploits

References

groups.google.com/g/golang-announce/c/ouZIlBimOsE (Third Party Advisory)
go-review.googlesource.com/c/crypto/+/278852 (Third Party Advisory)
lists.apache.org/thread.html/r68032132c0399c29d6cdc7bd44918535da54060a10a12b159… (mailing-list)

Frequently asked questions

What is CVE-2020-29652?: CVE-2020-29652 is a high-severity vulnerability in Golang SSH, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2020-12-17.
How severe is CVE-2020-29652?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2020-29652 known to be exploited?: 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.