CVE-2008-1887: Canonical Ubuntu Linux

High severity, CVSS 9.3. EPSS: 6.3% chance of exploitation in the next 30 days.

Python 2.5.2 and earlier allows context-dependent attackers to execute arbitrary code via multiple vectors that cause a negative size value to be provided to the PyString_FromStringAndSize function, which allocates less memory than expected when assert() is disabled and triggers a buffer overflow.

Affected products

• Canonical Ubuntu Linux: version 6.06 only; version 7.04 only; version 7.10 only; version 8.04 only
• Debian Debian Linux: version 4.0 only
• Python Python: up to and including 2.5.2

Published 2008-04-18. Last modified 2026-06-16.