CVE-2026-7531

CriticalCVSS 9.8/10Last modified Jun 26, 2026

Description

Use-after-free in PQC hybrid key-share handling. This is an incomplete-fix follow-up to CVE-2026-5460 (released in 5.9.1): a malicious TLS 1.3 server sending a truncated PQC hybrid KeyShare can still trigger the error cleanup path to operate on freed memory.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

Affected software

No affected versions have been published.

Timeline

Published
Jun 25, 2026
Last modified
Jun 26, 2026
NVD status
Analyzed

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CVE-2026-7531: Critical severity, CVSS 9.8 | Vulnix