CVE-2026-39830
Critical
Description
A malicious SSH peer could send unsolicited global request responses to fill an internal buffer, blocking the connection's read loop. The blocked goroutine could not be released by calling Close(), resulting in a resource leak per connection. Unsolicited global responses are now discarded.
SeverityCritical
CVSS9.1
Exploit probability—
Product
Golang Crypto
PublishedMay 22, 2026
First seenMay 22, 2026
Weakness typeCWE-833CWE-833
How to fix
Update
- golang crypto0.52.0 or later
- golang.org/x/crypto0.52.0 or later
Vendor advisories
- access.redhat.com/errata/RHSA-2026:41019
- access.redhat.com/errata/RHSA-2026:48151
- access.redhat.com/errata/RHSA-2026:36796
- access.redhat.com/errata/RHSA-2026:36199
- access.redhat.com/errata/RHSA-2026:37072
- access.redhat.com/errata/RHSA-2026:35833
- access.redhat.com/errata/RHSA-2026:49944
- access.redhat.com/errata/RHSA-2026:67450
- access.redhat.com/errata/RHSA-2026:29455
- access.redhat.com/errata/RHSA-2026:54531
- access.redhat.com/errata/RHSA-2026:61314
- access.redhat.com/errata/RHSA-2026:36808
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| golang crypto | v < 0.52.0 | 0.52.0 |
| golang.org/x/cryptoGo | v < 0.52.0 | 0.52.0 |
| microsoft azl3_cert-manager_1.12.15-6 | No range specified | — |
| microsoft azl3_cf-cli_8.7.11-5 | No range specified | — |
| microsoft azl3_docker-buildx_0.14.0-11 | No range specified | — |
| microsoft azl3_docker-compose_2.27.0-9 | No range specified | — |
| microsoft azl3_gh_2.62.0-15 | No range specified | — |
| microsoft azl3_kubernetes_1.30.10-23 | No range specified | — |
| microsoft azl3_kubevirt_1.7.1-2 | No range specified | — |
| microsoft azl3_moby-engine_25.0.3-17 | No range specified | — |
| microsoft azl3_nvidia-container-toolkit_1.17.8-2 | No range specified | — |
| microsoft azl3_packer_1.9.5-13 | No range specified | — |
| microsoft azl3_telegraf_1.31.0-19 | No range specified | — |
| microsoft azl3_kubernetes_1.30.10-25 | No range specified | — |
| microsoft azl3_moby-engine_25.0.3-18 | No range specified | — |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.