CVE-2012-3404: The vfprintf function in stdio-common/vfprintf.c in libc in GNU C Library (aka glibc) 2.12 and other versio...

Security readout for executives and security teams

CVE-2012-3404 is an old GNU C Library formatting bug. Certain crafted format strings can defeat FORTIFY_SOURCE checks and crash a process through stack corruption. The sources describe denial of service, not confirmed code execution or active exploitation. Exposure is most likely on Linux systems using affected glibc versions, including distribution packages covered by Red Hat, Ubuntu, and Gentoo advisories. Actual risk depends on whether local or remote inputs can reach vulnerable formatted-printing paths. Treat this as a routine but broad infrastructure patching issue. The business impact is service disruption, especially where attacker-controlled input can reach vulnerable logging or output formatting paths. Prioritize exposed systems and legacy Linux estates. Mitigation focus: Apply glibc updates from the relevant Linux distribution advisory.; Prioritize internet-facing services that process attacker-controlled text.; Restart services after updating glibc so patched libraries are loaded..

Prepared

Jun 14, 2026, 14:50 UTC (UTC+00:00)

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