admin/cve
1
0
Fork 0
mirror of https://github.com/0xMarcio/cve.git synced 2025-11-28 18:48:49 +00:00
Code Issues Packages Projects Releases Wiki Activity
cve/2025/CVE-2025-21971.md
0xMarcio cb00e1339f Update CVE list 2025-09-29 21:09
2025-09-29 21:09:30 +02:00

1.4 KiB
Raw Blame History

CVE-2025-21971

Description

In the Linux kernel, the following vulnerability has been resolved:net_sched: Prevent creation of classes with TC_H_ROOTThe function qdisc_tree_reduce_backlog() uses TC_H_ROOT as a terminationcondition when traversing up the qdisc tree to update parent backlogcounters. However, if a class is created with classid TC_H_ROOT, thetraversal terminates prematurely at this class instead of reaching theactual root qdisc, causing parent statistics to be incorrectly maintained.In case of DRR, this could lead to a crash as reported by Mingi Cho.Prevent the creation of any Qdisc class with classid TC_H_ROOT(0xFFFFFFFF) across all qdisc types, as suggested by Jamal.

POC

Reference

No PoCs from references.

Github