CVE-2026-7531 | THREATINT

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.

PUBLISHED Reserved 2026-04-30 | Published 2026-06-25 | Updated 2026-06-26 | Assigner wolfSSL

LOW: 2.3CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Problem types

CWE-416 Use After Free

Product status

Default status

unaffected

5.8.0 (semver)

affected

Credits

Thai Duong (Calif.io / Anthropic) finder

References

github.com/wolfSSL/wolfssl/pull/10327 patch

www.wolfssl.com/docs/security-vulnerabilities/

cve.org (CVE-2026-7531)

nvd.nist.gov (CVE-2026-7531)

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