| Name | CVE-2026-7531 |
| 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. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1140815 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| wolfssl (PTS) | bullseye | 4.6.0+p1-0+deb11u2 | vulnerable |
| bookworm | 5.5.4-2+deb12u2 | vulnerable |
| bookworm (security) | 5.5.4-2+deb12u3 | vulnerable |
| trixie | 5.7.2-0.1+deb13u1 | vulnerable |
| sid | 5.9.2-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| wolfssl | source | bookworm | (unfixed) | end-of-life | | |
| wolfssl | source | (unstable) | 5.9.2-1 | | | 1140815 |
Notes
[trixie] - wolfssl <no-dsa> (Minor issue)
[bookworm] - wolfssl <end-of-life> (EOL in bookworm LTS)
[bullseye] - wolfssl <postponed> (Minor issue)
https://github.com/wolfSSL/wolfssl/pull/10327 (v5.9.2-stable)