{"cve":"CVE-2023-44193","nvd":{"published":"2023-10-13T00:15:12.377","modified":"2026-06-17T06:27:05.880","status":"Modified","description":"An Improper Release of Memory Before Removing Last Reference vulnerability in Packet Forwarding Engine (PFE) of Juniper Networks Junos OS allows a local, low privileged attacker to cause an FPC crash, leading to Denial of Service (DoS).\n\nOn all Junos MX Series with MPC1 - MPC9, LC480, LC2101, MX10003, and MX80, when Connectivity-Fault-Management (CFM) is enabled in a VPLS scenario, and a specific LDP related command is run, an FPC will crash and reboot. Continued execution of this specific LDP command can lead to sustained Denial of Service condition.\n\nThis issue affects:\n\nJuniper Networks Junos OS on MX Series:\n\n\n\n  *  All versions prior to 20.4R3-S7;\n  *  21.1 versions prior to 21.1R3-S5;\n  *  21.2 versions prior to 21.2R3-S4;\n  *  21.3 versions prior to 21.3R3-S4;\n  *  21.4 versions prior to 21.4R3-S3;\n  *  22.1 versions prior to 22.1R3-S1;\n  *  22.2 versions prior to 22.2R2-S1, 22.2R3;\n  *  22.3 versions prior to 22.3R1-S2, 22.3R2.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-401"],"references":["https://supportportal.juniper.net/JSA73157","https://supportportal.juniper.net/JSA73157"],"products":["juniper:junos"],"source":"nvd","synced_at":"2026-10-19T21:39:34.467980132+00:00"},"epss":{"cve":"CVE-2023-44193","score":0.00174,"percentile":0.06865,"date":"2026-10-31"},"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."]}