CVE-2007-4573: Linux Kernel

High severity, CVSS 7.2. EPSS: 0.8% chance of exploitation in the next 30 days.

The IA32 system call emulation functionality in Linux kernel 2.4.x and 2.6.x before 2.6.22.7, when running on the x86_64 architecture, does not zero extend the eax register after the 32bit entry path to ptrace is used, which might allow local users to gain privileges by triggering an out-of-bounds access to the system call table using the %RAX register.

Affected products

• Linux Linux Kernel: up to and including 2.4.35; up to and including 2.6.22.6

Published 2007-09-24. Last modified 2026-06-16.