CVE-2026-22999 HIGH

CVE-2026-22999: net/sched: sch_qfq: do not free existing class in qfq_change_class()

Vendor Linux
Product Linux
Published January 25, 2026
Last update May 11, 2026
View on NVD All CVEs

CVSS base score

7.8/10
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

January 25, 2026 CVE published
May 11, 2026 Record updated