{"cve":"CVE-2024-39526","nvd":{"published":"2024-10-11T16:15:06.440","modified":"2026-06-17T07:42:07.533","status":"Analyzed","description":"An Improper Handling of Exceptional Conditions vulnerability in packet processing of Juniper Networks Junos OS on MX Series with MPC10/MPC11/LC9600 line cards, EX9200 with EX9200-15C lines cards, MX304 devices, and Juniper Networks Junos OS Evolved on PTX Series, allows an attacker sending malformed DHCP packets to cause ingress packet processing to stop, leading to a Denial of Service (DoS).  Continued receipt and processing of these packets will create a sustained Denial of Service (DoS) condition.\n\nThis issue only occurs if DHCP snooping is enabled. See configuration below.\n\nThis issue can be detected using following commands. Their output will display the interface status going down:\n\n\nuser@device>show interfaces <if--x/x/x>\nuser@device>show log messages | match <if--x/x/x>\nuser@device>show log messages ==> will display the \"[Error] Wedge-Detect : Host Loopback Wedge Detected: PFE: no,\" logs.\n\nThis issue affects:\nJunos OS on \n\nMX Series \n\nwith MPC10/MPC11/LC9600 line cards, EX9200 with EX9200-15C line cards, and MX304: \n\n\n  *  All versions before 21.2R3-S7, \n  *  from 21.4 before 21.4R3-S6, \n  *  from 22.2 before 22.2R3-S3, \n  *  all versions of 22.3,\n  *  from 22.4 before 22.4R3, \n  *  from 23.2 before 23.2R2; \n\n\n\nJunos OS Evolved on PTX Series: \n  *  from 19.3R1-EVO before 21.2R3-S8-EVO,\n\n  *  from 21.4-EVO before 21.4R3-S7-EVO, \n  *  from 22.1-EVO before 22.1R3-S6-EVO, \n  *  from 22.2-EVO before 22.2R3-S5-EVO, \n  *  from 22.3-EVO before 22.3R3-S3-EVO, \n  *  from 22.4-EVO before 22.4R3-S1-EVO, \n  *  from 23.2-EVO before 23.2R2-S2-EVO, \n  *  from 23.4-EVO before 23.4R2-EVO.\n\n\n\nJunos OS Evolved releases prior to 19.3R1-EVO are unaffected by this vulnerability","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/R:U","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-755"],"references":["https://supportportal.juniper.net/JSA88103"],"products":["juniper:junos","juniper:junos_os_evolved"],"source":"nvd","synced_at":"2026-10-19T21:55:31.737901711+00:00"},"epss":{"cve":"CVE-2024-39526","score":0.00367,"percentile":0.30612,"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."]}