VULNERABILITY INTELLIGENCE

CVE-2015-4199

CVSS score7.1 HIGH
EPSS probability2.11%
CISA KEVNot currently listed
Published2015-06-27
Last modified2026-06-17
CVSS vectorAV:N/AC:M/Au:N/C:N/I:N/A:C

Description

Race condition in the IPv6-to-IPv4 functionality in Cisco IOS 15.3S in the Performance Routing Engine (PRE) module on UBR devices allows remote attackers to cause a denial of service (NULL pointer free and module crash) by triggering intermittent connectivity with many IPv6 CPE devices, aka Bug ID CSCug47366.

Weakness classification

  • CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Primary references