CVE-2009-4895: Race condition in the tty_fasync function in drivers/char/tty_io.c in the Linux kernel before 2.6.32.6 allo...

Security readout for executives and security teams

This is an old Linux kernel race condition that could let a local user crash the system. The main business risk is availability on legacy or unpatched hosts, especially shared systems where untrusted users can log in. Exposure is most likely on legacy Linux systems running kernels before 2.6.32.6, or vendor kernels that did not backport the relevant tty fixes. Supported distribution kernels should be checked against their Ubuntu, Debian, or Red Hat advisory status. Address during legacy Linux risk reduction or standard patch cycles, escalating where untrusted users have local access. This is not supported as internet-wormable or actively exploited by the provided evidence. Mitigation focus: Update affected Linux kernels using vendor-supported security packages.; Check Ubuntu, Debian, Red Hat, or kernel advisories for backported fixes.; Prioritize shared hosts, bastions, and systems with untrusted local accounts..

Prepared

Jun 28, 2026, 01:40 UTC (UTC+00:00)

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