CVE-2009-3889: The dbg_lvl file for the megaraid_sas driver in the Linux kernel before 2.6.27 has world-writable permissio...

Security readout for executives and security teams

CVE-2009-3889 is an old Linux kernel issue where a debug control file for the MegaRAID SAS storage driver was writable by any local user. On affected systems, a non-privileged user could alter driver behavior or logging. This is mainly a local hardening and legacy-kernel exposure concern, not a remotely exploitable internet-facing flaw. Exposure is likely limited to legacy Linux systems running vulnerable kernels with the megaraid_sas driver present or loaded. Modern supported distributions are unlikely to be affected unless they run obsolete kernels or unpatched vendor builds. Treat as a legacy-system remediation item. It is not known to be remotely exploitable, but affected storage-driver systems with local users should be patched during normal vulnerability maintenance or sooner for shared, multi-user servers. Mitigation focus: Apply the relevant vendor kernel security update or supported kernel backport.; Upgrade kernels older than 2.6.27 where vendor guidance confirms exposure.; Prioritize legacy servers using MegaRAID SAS storage controllers..

Prepared

Jun 28, 2026, 18:09 UTC (UTC+00:00)

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