CVE-2011-1089: The addmntent function in the GNU C Library (aka glibc or libc6) 2.13 and earlier does not report an error...

Security readout for executives and security teams

This is a legacy Linux libc issue where a local user could make mount table updates fail silently, increasing the chance of corrupting /etc/mtab. It is not a remote compromise issue in the supplied sources, but it can affect system reliability and operational visibility on old Linux hosts. Exposure is most likely on legacy Linux systems with glibc/libc6 2.13 or earlier, especially multi-user servers, shared hosting, or systems where local users can run mount-related helpers. Modern, fully patched distributions are less likely to be exposed, but the bundle does not provide a complete affected-product matrix. Prioritize as legacy platform risk. It should not outrank internet-facing critical vulnerabilities, but unpatched multi-user Linux systems should be remediated because filesystem state corruption can disrupt operations and incident response visibility. Mitigation focus: Inventory hosts running glibc/libc6 2.13 or earlier.; Apply applicable vendor glibc/libc6 security updates.; Review Red Hat and Mandriva advisories where those distributions apply..

Prepared

Jun 24, 2026, 13:28 UTC (UTC+00:00)

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