CVE-1999-1111: Immunix Stackguard

High severity, CVSS 7.5. EPSS: 1.8% chance of exploitation in the next 30 days.

Vulnerability in StackGuard before 1.21 allows remote attackers to bypass the Random and Terminator Canary security mechanisms by using a non-linear attack which directly modifies a pointer to a return address instead of using a buffer overflow to reach the return address entry itself.

Affected products

• Immunix Stackguard: up to and including 1.21

Published 1999-11-09. Last modified 2026-06-16.