CVE-2016-4008: The _asn1_extract_der_octet function in lib/decoding.c in GNU Libtasn1 before 4.8, when used without the AS...

Security readout for executives and security teams

CVE-2016-4008 is a denial-of-service flaw in GNU Libtasn1 before 4.8. A malicious certificate can make affected software recurse indefinitely while parsing ASN.1 data, potentially hanging or disrupting services that process untrusted certificates. Exposure is most likely on systems or applications using GNU Libtasn1 before 4.8 to parse certificates, especially where certificates can be supplied remotely or by untrusted parties. Distribution-specific exposure depends on packaged versions and backported fixes. Treat as an availability risk. Patch on normal security-maintenance timelines, faster for internet-facing certificate-processing services. Current sources do not indicate active exploitation or confidentiality impact. Mitigation focus: Update GNU Libtasn1 to 4.8 or a vendor-fixed package.; Apply relevant Debian, Ubuntu, Fedora, Gentoo, or openSUSE security updates.; Prioritize services that parse externally supplied certificates..

Prepared

Jun 13, 2026, 19:15 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.