CVE-2026-39834
Critical
Description
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.
SeverityCritical
CVSS9.1
Exploit probability—
Product
Golang Crypto
PublishedMay 22, 2026
First seenMay 22, 2026
Weakness typeCWE-190Integer overflow
How to fix
Update
- golang crypto0.52.0 or later
- golang.org/x/crypto0.52.0 or later
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 | — |
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