Debian 11 — glewlwyd — multiple vulnerabilities (6 CVEs) — patch and remediation guide
🟡 Medium ⏱ 10–30 min Last verified: 25 May 2026 Affected versions: Debian 11 (bullseye) 📖 ~4 min read • Source: Debian Security Tracker Related CVEs: CVE-2021-40818 CVE-2021-45379 CVE-2022-27240 CVE-2022-29967 CVE-2023-49208 CVE-2024-25715 Upstream summary: scheme/webauthn.c in Glewlwyd SSO server through 2.5.3 has a buffer overflow during FIDO2 signature validation in webauthn registration. Table of […]