{"cve":"CVE-2024-47493","nvd":{"published":"2024-10-11T16:15:09.320","modified":"2026-06-17T07:57:10.513","status":"Analyzed","description":"A Missing Release of Memory after Effective Lifetime vulnerability in the Packet Forwarding Engine (PFE) of the Juniper Networks Junos OS on the MX Series platforms with Trio-based FPCs allows an unauthenticated, adjacent attacker to cause a Denial of Service (DoS).\n\nIn case of channelized Modular Interface Cards (MICs), every physical interface flap operation will leak heap memory. Over a period of time, continuous physical interface flap operations causes local FPC  to eventually run out of memory and crash.  \n\nBelow CLI command can be used to check the memory usage over a period of time:\n\n  user@host> show chassis fpc\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n                Temp  CPU Utilization (%)   CPU Utilization (%)  Memory   \nUtilization (%)\n  Slot State      (C)  Total  Interrupt      1min   5min  \n15min DRAM (MB) Heap     Buffer\n\n  0 \nOnline       43     41         \n2                           2048       49         14\n\n  1 \nOnline       43     41         \n2                          \n2048       49         14\n\n  2 \nOnline       43     41         \n2                          \n2048       49         14\n\n\n\n\n\n\n\n\n\nThis issue affects Junos OS on MX Series: \n\n\n\n\n  *  All versions before 21.2R3-S7, \n  *  from 21.4 before 21.4R3-S6, \n  *  from 22.1 before 22.1R3-S5, \n  *  from 22.2 before 22.2R3-S3, \n  *  from 22.3 before 22.3R3-S2, \n  *  from 22.4 before 22.4R3, \n  *  from 23.2 before 23.2R2, \n  *  from 23.4 before 23.4R2.","cvss_v4":{"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/U:Green","score":7.1},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":6.5},"cwes":["CWE-401"],"references":["https://supportportal.juniper.net/","https://www.juniper.net/documentation/us/en/software/junos/interfaces-link-multilink/topics/topic-map/link-multilink-services-understanding.html#id-multilink-interfaces-on-channelized-mics-overview"],"products":["juniper:junos"],"source":"nvd","synced_at":"2026-10-19T21:55:31.737901711+00:00"},"epss":{"cve":"CVE-2024-47493","score":0.0037,"percentile":0.30896,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}