https://vulnerability.circl.lu/sightings/feed 2026-06-03T02:22:55.000855+00:00 Vulnerability-Lookup info@circl.lu python-feedgen Contains only the most 10 recent sightings. https://vulnerability.circl.lu/sighting/af9fbb42-cf9f-4248-a075-e198a12d997d/export 2026-06-03T02:22:55.354072+00:00 Automation user https://cve.circl.lu/user/automation {"uuid": "af9fbb42-cf9f-4248-a075-e198a12d997d", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2025-21971", "type": "seen", "source": "https://t.me/cvedetector/21794", "content": "{\n \"Source\": \"CVE FEED\",\n \"Title\": \"CVE-2025-21971 - \"Linux Kernel net_sched TC_H_ROOT Class Creation Vulnerability\"\", \n \"Content\": \"CVE ID : CVE-2025-21971 \nPublished : April 1, 2025, 4:15 p.m. | 1\u00a0hour, 15\u00a0minutes ago \nDescription : In the Linux kernel, the following vulnerability has been resolved: \n \nnet_sched: Prevent creation of classes with TC_H_ROOT \n \nThe function qdisc_tree_reduce_backlog() uses TC_H_ROOT as a termination \ncondition when traversing up the qdisc tree to update parent backlog \ncounters. However, if a class is created with classid TC_H_ROOT, the \ntraversal terminates prematurely at this class instead of reaching the \nactual root qdisc, causing parent statistics to be incorrectly maintained. \nIn case of DRR, this could lead to a crash as reported by Mingi Cho. \n \nPrevent the creation of any Qdisc class with classid TC_H_ROOT \n(0xFFFFFFFF) across all qdisc types, as suggested by Jamal. \nSeverity: 0.0 | NA \nVisit the link for more details, such as CVSS details, affected products, timeline, and more...\",\n \"Detection Date\": \"01 Apr 2025\",\n \"Type\": \"Vulnerability\"\n}\n\ud83d\udd39 t.me/cvedetector \ud83d\udd39", "creation_timestamp": "2025-04-01T19:44:41.000000Z"} 2025-04-01T19:44:41+00:00