CVE-2026-7531

Use-after-free in PQC hybrid key-share handling

State: Published
Severity: 2.3 Low
Published: Jun 25, 2026
Updated: Jun 26, 2026
Reserved: Apr 30, 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.

Scores

CVSS	Score	Vector	Source
4.0	2.3 Low	CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N	wolfSSL

Weaknesses

CWE-416 Use After Free

Affected Products

Product	Versions
wolfSSLwolfSSL	5.8.0 through 5.9.1Affected

References

https://github.com/wolfSSL/wolfssl/pull/10327patch
https://www.wolfssl.com/docs/security-vulnerabilities/

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