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Unauthenticated TLS 1.3 KeyUpdate record can cause persistent connection retention and DoS in crypto/tls

Type: advisorySources: OSV

If one side of the TLS connection sends multiple key update messages post-handshake in a single record, the connection can deadlock, causing uncontrolled consumption of resources. This can lead to a denial of service. This only affects TLS 1.3.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2026-32283
Confirmed fixed CVEs
Not specified
Updated in this feed
7 Nov 2026, 17:31 UTC · Revision 1

Source evidence

Unauthenticated TLS 1.3 KeyUpdate record can cause persistent connection retention and DoS in crypto/tls

core-osv · Original source

Published 8 Apr 2026, 01:06 UTC

If one side of the TLS connection sends multiple key update messages post-handshake in a single record, the connection can deadlock, causing uncontrolled consumption of resources. This can lead to a denial of service. This only affects TLS 1.3.

osv:CVE-2026-32283
Complete source record
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  "id": "1d632856e8b74179b6c43f902ccca772cb05981a52d8e58be9f09c88030073e6",
  "url": "https://osv.dev/vulnerability/CVE-2026-32283",
  "method": "structured",
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    "title": "Unauthenticated TLS 1.3 KeyUpdate record can cause persistent connection retention and DoS in crypto/tls",
    "summary": "If one side of the TLS connection sends multiple key update messages post-handshake in a single record, the connection can deadlock, causing uncontrolled consumption of resources. This can lead to a denial of service. This only affects TLS 1.3.",
    "evidence": "osv:CVE-2026-32283",
    "products": [],
    "severity": "high",
    "structured": {
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        "CVE-2026-32283",
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