Use-after-free in Linux Kernel traffic control (qdisc) subsystem allows local authenticated attackers to execute arbitrary code, escalate privileges, or cause denial of service. Affects Linux Kernel versions prior to vendor-released patches across multiple stable branches (6.6.x, 6.12.x, 6.15, 6.16-rc1). Triggered when classful qdiscs like DRR and HFSC incorrectly handle child class deactivation during enqueue operations, leaving stale class pointers that can be exploited after deletion. Vendor patches available from kernel.org git stable tree; no active exploitation confirmed (not in CISA KEV), but PoC reproducer exists in public advisory.
Information Disclosure
Linux
Use After Free
Memory Corruption
Debian
+1
NVD
VulDB
CVSS 3.1
7.8
EPSS
0.0%