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CVE-2026-32283 High · CVSS 7.5 High Impact

crypto/tls: TLS Connection Deadlock via Key Update Flood

Exploitable

This CVE is exploitable in typical deployments. Upgrade to the fixed version as soon as possible.

Component

Go standard library (crypto/tls)

Disclosed

Apr 8, 2026

CVSS Score

7.5

Description

Go’s crypto/tls package can enter a permanent deadlock when a TLS peer sends multiple consecutive key update handshake messages. An attacker who can establish a TLS connection to the server can trigger this condition, causing the connection handler goroutine to stall indefinitely. Under sustained attack, this exhausts available goroutines and file descriptors, resulting in denial of service.

Version summary

Community Edition

2.13.4

addresses this CVE

Affected CE versions

>= 2.0, < 2.13.4

Enterprise Edition

2.13.2

addresses this CVE

Affected EE versions

>= 2.0, < 2.13.2

Upgrade to the addressed version or later to remediate this vulnerability.

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