CVE-2026-7531 | Use-after-free in PQC hybrid key-share handling. This is an … | CVSS 2.3 LOW

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.

Metadata

CVE ID: CVE-2026-7531
State: PUBLISHED
Assigner: wolfSSL
Reserved: 2026-04-30 17:58 UTC
Published: 2026-06-25 20:01 UTC
Last updated: 2026-06-25 20:01 UTC
Primary CWE: CWE-416
CWE-416 Use After Free
Vendor / Product: wolfSSL / wolfSSL
Sources: cve.org · NVD

Severity & Metrics

2.3 LOW CVSS 4.0

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

Affected products (1)

Vendor	Product	Platform	Versions
wolfSSL	wolfSSL	—	5.8.0 ≤ 5.9.1

Weakness (CWE)

CWE	Source	Description
CWE-416	cna	CWE-416 Use After Free

CVSS scores (1)

Score	Severity	Version	Source	Vector
2.3	LOW	4.0	cna	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

References (2)