CVE-2009-3043: Linux Kernel

Medium severity, CVSS 4.9. EPSS: 0.9% chance of exploitation in the next 30 days.

The tty_ldisc_hangup function in drivers/char/tty_ldisc.c in the Linux kernel 2.6.31-rc before 2.6.31-rc8 allows local users to cause a denial of service (system crash, sometimes preceded by a NULL pointer dereference) or possibly gain privileges via certain pseudo-terminal I/O activity, as demonstrated by KernelTtyTest.c.

Affected products

• Linux Linux Kernel: up to and including 2.6.31; version 2.6.0 only; version 2.6.1 only; version 2.6.2 only; version 2.6.3 only; version 2.6.4 only; …

Published 2009-09-02. Last modified 2026-06-16.