CVE-2026-22999

net/sched: sch_qfq: do not free existing class in qfq_change_class()

Published: 1/25/2026 Last updated: 2/9/2026 Reserved: 1/13/2026

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.

CNA assigner: Linux (416baaa9-dc9f-4396-8d5f-8c081fb06d67) Requested by: n/a

Opam packages affected (29)

albatross cdrom conf-bpftool conf-libbpf conf-linux-libc-dev core core_unix hvsock mirage-block-unix mm ocaml-probes ortools_solvers orun rawlink rawlink-eio rawlink-lwt restricted shell solo5 solo5-bindings-hvt solo5-bindings-spt solo5-cross-aarch64 solo5-kernel-ukvm tracy-client tuntap uring vhd-format vhd-format-lwt xapi-stdext-unix

Products affected (2)

Product	Vendor	Version
Linux	Linux	Snapdragon 662 Mobile Platform
Linux	Linux	Snapdragon 665 Mobile Platform

CVE-2026-22999

net/sched: sch_qfq: do not free existing class in qfq_change_class()

Opam packages affected (29)

Products affected (2)

References (14)