CVE-2013-4220: Linux Kernel

Medium severity, CVSS 4.9. EPSS: 0.5% chance of exploitation in the next 30 days.

The bad_mode function in arch/arm64/kernel/traps.c in the Linux kernel before 3.9.5 on the ARM64 platform allows local users to cause a denial of service (system crash) via vectors involving an attempted register access that triggers an unexpected value in the Exception Syndrome Register (ESR).

Affected products

• Linux Linux Kernel: up to and including 3.9.4; version 3.9.0 only; version 3.9.1 only; version 3.9.2 only; version 3.9.3 only

Published 2013-08-25. Last modified 2026-06-16.