Description
In the Linux kernel, the following vulnerability has been resolved: net/sched: sch_qfq: do not free existing class in qfq_change_class() Fixes qfq_change_class() error case. cl->qdisc and cl should only be freed if a new class and qdisc were allocated, or we risk various UAF.
References (7)
Core 7
Core References
Scores
CVSS v3
7.8
EPSS
0.0001
EPSS Percentile
1.4%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Details
Status
published
Products (24)
linux/Kernel
3.8.0 - 5.10.249linux
linux/Kernel
5.11.0 - 5.15.199linux
linux/Kernel
5.16.0 - 6.1.162linux
linux/Kernel
6.13.0 - 6.18.7linux
linux/Kernel
6.2.0 - 6.6.122linux
linux/Kernel
6.7.0 - 6.12.67linux
Linux/Linux
< 3.8
Linux/Linux
3.8
Linux/Linux
462dbc9101acd38e92eda93c0726857517a24bbd - 0a234660dc70ce45d771cbc76b20d925b73ec160
Linux/Linux
462dbc9101acd38e92eda93c0726857517a24bbd - 2a64fb9b47afffeb5dbab5fd3a518e1436dcc90e
... and 14 more
Published
Jan 25, 2026
Tracked Since
Feb 18, 2026