Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2026-39834

42
FAUCET Score

When writing data larger than 4GB in a single Write call on an SSH channel, an integer overflow in the internal payload size calculation caused the write loop to spin indefinitely, sending empty packets without making progress. The size comparison now uses int64 to prevent truncation.

First published: May 22, 2026Last modified: May 22, 2026

Impacted Technologies

VendorProductVersion(s)CPE
< 0.52.0CPE matchmatch criteria
cpe:2.3:a:golang:crypto:*:*:*:*:*:go:*:*

CVSS Data

CVSS version used by this source: 3.1

9.1CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.53%
Probability of exploitation in next 30 days
EPSS Percentile
41.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0053 is in the 20th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (29)

gopatch availablevia ghsa
Product: golang.org/x/cryptoFixed in: 0.52.0
microsoftpatch availablevia msrc
Product: azl3 telegraf 1.31.0-19 on Azure Linux 3.0Fixed in: 1.31.0-21
microsoftpatch availablevia msrc
Product: azl3 cert-manager 1.12.15-6 on Azure Linux 3.0Fixed in: 1.12.15-8
microsoftpatch availablevia msrc
Product: azl3 cf-cli 8.7.11-5 on Azure Linux 3.0Fixed in: 8.7.11-6
microsoftpatch availablevia msrc
Product: azl3 docker-buildx 0.14.0-11 on Azure Linux 3.0Fixed in: 0.14.0-13
microsoftpatch availablevia msrc
Product: azl3 docker-compose 2.27.0-9 on Azure Linux 3.0Fixed in: 2.27.0-11
microsoftpatch availablevia msrc
Product: azl3 gh 2.62.0-15 on Azure Linux 3.0Fixed in: 2.62.0-16
microsoftpatch availablevia msrc
Product: azl3 kubernetes 1.30.10-23 on Azure Linux 3.0Fixed in: 1.30.10-25
microsoftpatch availablevia msrc
Product: azl3 kubernetes 1.30.10-25 on Azure Linux 3.0Fixed in: 1.30.10-25
microsoftpatch availablevia msrc
Product: azl3 kubevirt 1.7.1-2 on Azure Linux 3.0Fixed in: 1.7.1-5
microsoftpatch availablevia msrc
Product: azl3 moby-engine 25.0.3-17 on Azure Linux 3.0Fixed in: 25.0.3-18
microsoftpatch availablevia msrc
Product: azl3 moby-engine 25.0.3-18 on Azure Linux 3.0Fixed in: 25.0.3-18
microsoftpatch availablevia msrc
Product: azl3 nvidia-container-toolkit 1.17.8-2 on Azure Linux 3.0Fixed in: 1.17.8-3
microsoftpatch availablevia msrc
Product: azl3 packer 1.9.5-13 on Azure Linux 3.0Fixed in: 1.9.5-14
microsoftpatch availablevia msrc
Product: 21418-17084Fixed in: 25.0.3-18
microsoftpatch availablevia msrc
Product: 21274-17084Fixed in: 25.0.3-18
microsoftpatch availablevia msrc
Product: 20984-17084Fixed in: 1.12.15-8
microsoftpatch availablevia msrc
Product: 20433-17084Fixed in: 1.17.8-3
microsoftpatch availablevia msrc
Product: 20966-17084Fixed in: 1.9.5-14
microsoftpatch availablevia msrc
Product: 21258-17084Fixed in: 1.31.0-21
microsoftpatch availablevia msrc
Product: 20985-17084Fixed in: 8.7.11-6
microsoftpatch availablevia msrc
Product: 21271-17084Fixed in: 0.14.0-13
microsoftpatch availablevia msrc
Product: 21272-17084Fixed in: 2.27.0-11
microsoftpatch availablevia msrc
Product: 21278-17084Fixed in: 2.62.0-16
microsoftpatch availablevia msrc
Product: 21256-17084Fixed in: 1.30.10-25
microsoftpatch availablevia msrc
Product: 21378-17084Fixed in: 1.30.10-25
microsoftpatch availablevia msrc
Product: 21299-17084Fixed in: 1.7.1-5
ubuntupatch availablevia ubuntu_usn
Product: lxd (bionic)Fixed in: 3.0.3-0ubuntu1~18.04.2+esm3
ubuntupatch availablevia ubuntu_usn
Product: lxd (xenial)Fixed in: 2.0.11-0ubuntu1~16.04.4+esm3

Vendor Advisories (3)

goGHSA-rm3j-f69w-wqmqcritical

golang.org/x/crypto vulnerable to infinite loop on large channel writes

Jun 25, 2026
ubuntuUSN-8447-2

LXD vulnerabilities

Jun 18, 2026
microsoft2026-May/CVE-2026-39834Important

Invoking infinite loop on large channel writes in golang.org/x/crypto/ssh

May 12, 2026

References

go.dev / cl/781663
Issue Tracking
go.dev / issue/79567
Issue Tracking
groups.google.com / g/golang-announce/c/a082jnz-LvI
Mailing List
pkg.go.dev / vuln/GO-2026-5020
Vendor Advisory