CVE-2012-1311: Cisco IOS

High severity, CVSS 7.8. EPSS: 2% chance of exploitation in the next 30 days.

The RSVP feature in Cisco IOS 15.0 and 15.1 and IOS XE 3.2.xS through 3.4.xS before 3.4.2S, when a VRF interface is configured, allows remote attackers to cause a denial of service (interface queue wedge and service outage) via crafted RSVP packets, aka Bug ID CSCts80643.

Affected products

• Cisco IOS: version 15.0 only; version 15.1 only
• Cisco IOS XE: version 3.2.0s only; version 3.2.1s only; version 3.2.2s only; version 3.3.0s only; version 3.4.0s only

Published 2012-03-29. Last modified 2026-06-16.