{"id":"CVE-2015-4203","aliases":["EUVD-2015-4226","GHSA-mfgx-5384-69g8"],"status":"published","title":"Race condition in Cisco IOS 12.2SCH in the Performance Routing Engine (PRE) module on uBR10000...","description":"Race condition in Cisco IOS 12.2SCH in the Performance Routing Engine (PRE) module on uBR10000 devices, when NetFlow and an MPLS IPv6 VPN are configured, allows remote attackers to cause a denial of service (PXF process crash) by sending malformed MPLS 6VPE packets quickly, aka Bug ID CSCud83396.","severity":{"version":"2.0","score":5.4,"vector":"AV:N/AC:H/Au:N/C:N/I:N/A:C","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.02208,"percentile":0.82701,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-362"],"published":"2015-06-23T14:00:00Z","modified":"2026-06-17T00:26:54Z","products":[{"vendor":"cisco","product":"ios"}],"references":[{"url":"http://www.securitytracker.com/id/1032692","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"http://tools.cisco.com/security/center/viewAlert.x?alertId=39439","tags":["vendor-advisory","x_refsource_CISCO","x_transferred","Vendor Advisory"]},{"url":"http://www.securityfocus.com/bid/75339","tags":["vdb-entry","x_refsource_BID","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2015-4203"},{"url":"https://github.com/advisories/GHSA-mfgx-5384-69g8"}],"sources":{"cve":[{"id":"CVE-2015-4203","description":"Race condition in Cisco IOS 12.2SCH in the Performance Routing Engine (PRE) module on uBR10000 devices, when NetFlow and an MPLS IPv6 VPN are configured, allows remote attackers to cause a denial of service (PXF process crash) by sending malformed MPLS 6VPE packets quickly, aka Bug ID CSCud83396.","status":"published","published":"2015-06-23T14:00:00Z","modified":"2024-08-06T06:04:03.119Z","updated_at":"2026-11-02T14:35:43.322279Z"}],"euvd":[{"id":"EUVD-2015-4226","description":"Race condition in Cisco IOS 12.2SCH in the Performance Routing Engine (PRE) module on uBR10000 devices, when NetFlow and an MPLS IPv6 VPN are configured, allows remote attackers to cause a denial of service (PXF process crash) by sending malformed MPLS 6VPE packets quickly, aka Bug ID CSCud83396.","status":"published","published":"2015-06-23T14:00:00Z","modified":"2024-08-06T06:04:03Z","updated_at":"2026-11-03T02:22:05.081899Z"}],"ghsa":[{"id":"GHSA-mfgx-5384-69g8","title":"Race condition in Cisco IOS 12.2SCH in the Performance Routing Engine (PRE) module on uBR10000...","description":"Race condition in Cisco IOS 12.2SCH in the Performance Routing Engine (PRE) module on uBR10000 devices, when NetFlow and an MPLS IPv6 VPN are configured, allows remote attackers to cause a denial of service (PXF process crash) by sending malformed MPLS 6VPE packets quickly, aka Bug ID CSCud83396.","status":"published","published":"2022-05-17T03:13:42Z","modified":"2023-01-27T05:07:18Z","cwes":["CWE-362"],"updated_at":"2026-11-02T14:43:05.912007Z"}],"nvd":[{"id":"CVE-2015-4203","description":"Race condition in Cisco IOS 12.2SCH in the Performance Routing Engine (PRE) module on uBR10000 devices, when NetFlow and an MPLS IPv6 VPN are configured, allows remote attackers to cause a denial of service (PXF process crash) by sending malformed MPLS 6VPE packets quickly, aka Bug ID CSCud83396.","status":"published","published":"2015-06-23T14:59:01.37Z","modified":"2026-06-17T00:26:54.877Z","cvss":[{"version":"2.0","score":5.4,"vector":"AV:N/AC:H/Au:N/C:N/I:N/A:C","level":"medium","assessor":"primary"}],"cwes":["CWE-362"],"updated_at":"2026-11-02T14:03:05.884985Z"}]}}