Debian 11 — klibc — multiple vulnerabilities (5 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-2011-1930 CVE-2021-31870 CVE-2021-31871 CVE-2021-31872 CVE-2021-31873 Upstream summary: In klibc 1.5.20 and 1.5.21, the DHCP options written by ipconfig to /tmp/net-$DEVICE.conf are not properly escaped. This may allow a […]