Use-after-free in wolfSSL - CVE-2026-7531
Published: July 1, 2026
Vulnerability identifier: #VU136653
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-7531
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: wolfSSL
Affected software:
wolfSSL
wolfSSL
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to a use-after-free in PQC hybrid key-share handling when processing a truncated PQC hybrid KeyShare. A remote attacker can send a truncated PQC hybrid KeyShare to cause a denial of service.
The issue can be triggered by a malicious TLS 1.3 server.
How to mitigate CVE-2026-7531
Install security update from vendor's website.