CVE-2010-3301: Canonical Ubuntu Linux

High severity, CVSS 7.2. EPSS: 3.8% chance of exploitation in the next 30 days.

The IA32 system call emulation functionality in arch/x86/ia32/ia32entry.S in the Linux kernel before 2.6.36-rc4-git2 on the x86_64 platform does not zero extend the %eax register after the 32-bit entry path to ptrace is used, which allows local users to gain privileges by triggering an out-of-bounds access to the system call table using the %rax register. NOTE: this vulnerability exists because of a CVE-2007-4573 regression.

Affected products

• Canonical Ubuntu Linux: version 9.10 only; version 10.04 only; version 10.10 only
• Linux Linux Kernel: before 2.6.36 (fixed in 2.6.36); version 2.6.36 only
• Suse Linux Enterprise Real Time Extension: version 11 only

Published 2010-09-22. Last modified 2026-06-16.